keeloq® microcontroller based code hopping encoder

... 32 bits of hopping code data, 32 bits of fixed code data and to bits of status information © 2009-2011 Microchip Technology Inc DS01259B-page AN1259 HOPPING CODE PORTION The hopping code portion ... calculated by encrypting the counter, discrimination value, and function code with the Encoder Key (KEY) A new hopping code is calculated every time a button press is pressed The synchronization ... decryption check on the receiver end FIXED CODE PORTION The 32 bits of fixed code consist of 28 bits of serial number and a copy of the 4-bit function code Each code word contains a preamble, header...

Ngày tải lên: 11/01/2016, 17:03

... or 102.4ms HOPPING CODE PORTION The hopping code portion is calculated by encrypting the counter, discrimination value, and function code with the Encoder Key (KEY) A new hopping code is calculated ... consists of 128 bits of hopping code data, 43 bits of fixed code data and bit of status information Each code word contains a preamble, header and data, and is separated from another code by guard time ... INFORMATION Microchip’s Secure Data Products are covered by some or all of the following: Code hopping encoder patents issued in European countries and U.S.A Secure learning patents issued in European...

Ngày tải lên: 11/01/2016, 17:04

... transmission consists of 64 bits of hopping code data, 36 bits of fixed code data and bits of status information FIXED CODE PORTION HOPPING CODE PORTION Each code word contains a preamble, header ... calculated by encrypting the counter, discrimination value, and function code with the Encoder Key (KEY) A new hopping code is calculated every time a button press is pressed The discrimination ... INFORMATION Microchip’s Secure Data Products are covered by some or all of the following: Code hopping encoder patents issued in European countries and U.S.A Secure learning patents issued in European...

Ngày tải lên: 11/01/2016, 17:04

... Encrypted (32 bits) Function code (8 bits) A KEELOQ transmission consists of 32 bits of hopping code data and 32 bits of fixed code data HOPPING CODE PORTION The hopping code portion is calculated ... encrypting the function code, serial number, user code, counter, and a checksum with the Transmitter Key (KEY) A new hopping code is calculated every time a button is pressed The user code can be programmed ... to PIC® Microcontrollers”, (DS01252), Microchip Technology Inc., 2009 ADDITIONAL INFORMATION Microchip’s Secure Data Products are covered by some or all of the following: Code hopping encoder patents...

Ngày tải lên: 11/01/2016, 16:55

... consists of 128 bits of hopping code data, 32 bits of fixed code data HOPPING CODE PORTION The hopping code portion is calculated by encrypting the function code, serial number, user code, counter, and ... (KEY) A new hopping code is calculated every time a button is pressed The user code can be programmed with any fixed value to serve as a post decryption check on the receiver end This code portion ... INFORMATION Microchip’s Secure Data Products are covered by some or all of the following: Code hopping encoder patents issued in European countries and U.S.A Secure learning patents issued in European...

Ngày tải lên: 11/01/2016, 16:56

... called microcontrollers 1.2 Microcontroller systems Microcontrollers are general purpose microprocessors which have additional parts that allow them to control external devices Basically, a microcontroller ... clock All microcontrollers require an oscillator (known as a clock) to operate Mo~ microcontrollers will operate with a crystal and two capacitors Some will operat Microcontroller- based Temperature ... reset in microcontrollers Most microcontrollers have resistors connected to the supply voltage and this ensures that the microcontroller starts properly after the application of power (POR) Microcontroller...

Ngày tải lên: 22/12/2013, 21:15

... JWBK063-FM JWBK063-Ibrahim January 4, 2006 18:11 Char Count= Microcontroller Based Applied Digital Control Microcontroller Based Applied Digital Control D Ibrahim C 2006 John Wiley & Sons, ... Internal Clock 3.3 Some Popular PIC Microcontrollers 3.3.1 PIC16F84 Microcontroller 3.3.2 PIC16F877 Microcontroller 3.4 Exercises Further Reading Programming PIC Microcontrollers in C 4.1 PICC Lite ... and implemented on the microcontrollers This book is about the theory and practice of microcontroller based automatic control systems engineering A previous knowledge of microcontroller hardware...

Ngày tải lên: 22/12/2013, 21:15

... Internal Clock 3.3 Some Popular PIC Microcontrollers 3.3.1 PIC16F84 Microcontroller 3.3.2 PIC16F877 Microcontroller 3.4 Exercises Further Reading Programming PIC Microcontrollers in C 4.1 PICC Lite ... and implemented on the microcontrollers This book is about the theory and practice of microcontroller based automatic control systems engineering A previous knowledge of microcontroller hardware ... disk comes round The encoder s controller counts the pulses in a given time, and this is proportional to the speed of the shaft Figure 1.16 shows a typical commercial encoder Figure 1.15 Commercially...

Ngày tải lên: 29/10/2015, 12:30

... Learn Code Hopping Decoder on a PIC16C56 AN652 DS00652 KEELOQ Simple Code Hopping Decoder AN659 DS00659 KEELOQ Code Hopping Decoder on a PIC16C56 (public version) AN661 DS00661 Secure Learn Code Hopping ... Mid-Range, KEELOQ, Decoder and PIC16CE62X DS00742B-page REFERENCES KEELOQ Code Hopping Decoder on a PIC16C56 AN642 DS00642 Converting NTQ105/106 Designs to HCS200/300s AN644 DS00644 Code Hopping Security ... Secure Learn Code Hopping Decoder on a PIC16C56 (public version) AN662 DS00662 KEELOQ Simple Code Hopping Decoder (public version) AN663 DS00663 Using KEELOQ to Generate Hopping Passwords AN665 DS00665...

Ngày tải lên: 11/01/2016, 11:35

... result, it is clear that soft decisionbased Code- PIC (SDCode-PIC) performs significantly better than soft decision -based Sub-PIC (SDSub-PIC) [30] and soft decision based Block-PIC (SDBlock-PIC) with ... than AWGN channel due to ICI Code -based parallel interference cancellation technique (code- PIC) As discussed in Section 4, there are two groups of users, B1 and B2, based on data rates where U1 ... (PO-CI) codes such that cross-correlation between users from B1 and B2 group is low This results in reduced MAI between users The estimated interference is cancelled out using a code -based PIC (Code- PIC)...

Ngày tải lên: 20/06/2014, 22:20

... (4) Class -Based Fair Code Allocation (CFCA) Protocol This section presents our class -based fair code allocation (CFCA) protocol to assign the appropriate OVSF codes to the traffic flows based on ... higher-rate code to decode the data segment, the data segment is decoded using the higher rate code In the next frame, the control header is again decoded using the initially assigned code and the ... affinity-mate code (lines to 5) and then to assign a higher rate non-affinity-mate code if an affinitymate code is not available (6 to 14) Class -Based Fair Code Allocation (CFCA) Protocol for OFCDM-Based...

Ngày tải lên: 21/06/2014, 11:20

... channel models of the time -hopping UWB multiple access communication system over frequency-selective fading channel Section highlights the rationale of the prefiltering -based multiuser UWB MISO ... Tc User separation is accomplished by user-specific pseudo-random TH code {ck } j =0, ,N −1 accounts for the kth user’s TH code j where we model the multipath channel as a tapped-delay line with ... performance According to the above results, several remarks can be made (1) Though ZF -based scheme outperforms TR-MFbased scheme, nevertheless, the ZF scheme is only applicable when K(L + P) ≤ MP For...

Ngày tải lên: 21/06/2014, 19:20

... Collision-Free Frequency Hopping (CFFH) Scheme The CFFH system is essentially an OFDMA system equipped with secure FH -based dynamic spectrum access control, where the hopping pattern is determined ... station uses an nT × nT space-time block code (STBC) Note that nonsquare STBC codes [15, 16] exists, but for notation simplicity, here we adopt the nT × nT square code i i For each user, divide the ... each user transmits i Gi = Nu /nT = code matrices in one OFDM symbol period Consider the nth block for the ith user, where n = 1, in this case The space-time encoder takes nT = complex symbols xi,1...

Ngày tải lên: 21/06/2014, 20:20

... the BSOR iterative method and makes use of the spreading codes directly is proposed; this enables its practical implementation in long -code CDMA systems (e.g., IS-95 and UMTS) where the cross-correlation ... linear BSOR-GSIC detector ST g em,g −1 Rg,g ym−1,g μ ym,g + + + − SYSTEM MODEL AND THE PROPOSED BSOR -BASED LINEAR GSIC STRUCTURE In this work, we consider a scenario of an uplink channel where K users ... channel using binary phase shift keying (BPSK) Each user is characterized by its own pseudonoise code of length N chips The received signal is expressed in vector form as r = SAb + n, ym,g Sg em,g+1...

Ngày tải lên: 22/06/2014, 00:20

... the BSOR iterative method and makes use of the spreading codes directly is proposed; this enables its practical implementation in long -code CDMA systems (e.g., IS-95 and UMTS) where the cross-correlation ... linear BSOR-GSIC detector ST g em,g −1 Rg,g ym−1,g μ ym,g + + + − SYSTEM MODEL AND THE PROPOSED BSOR -BASED LINEAR GSIC STRUCTURE In this work, we consider a scenario of an uplink channel where K users ... channel using binary phase shift keying (BPSK) Each user is characterized by its own pseudonoise code of length N chips The received signal is expressed in vector form as r = SAb + n, ym,g Sg em,g+1...

Ngày tải lên: 22/06/2014, 06:20

... for GPS and Galileo code tracking, providing a certain sufficiently small Doppler shift, are based on what is typically called a feedback delay estimator and are implemented based on a feedback ... the first path Another very promising code tracking algorithm is Teager-Kaiser (TK) -based delay estimation algorithm The principle and the properties of the TK -based delay estimation algorithm are ... written as [41]: r(t) = Eb the random variables (e.g., PRN code, channel effects, etc.), and (5) is the reference modulated PRN code with a code phase τ and Doppler shift fD Since the main focus...

Ngày tải lên: 22/06/2014, 19:20

... product code was regarded as one of the most advanced in JSCC, the technique using product code proposed in [12] was used for the second comparison This product code used RS codes as outer code ... obtained Actually, RS codes are very effective for burst errors Therefore, using RS codes as outer code is very useful when the inner code has bursty erroneous paths, for example, RCPC codes [29] However, ... wavelet -based scalable coder and the DBTC module For the sake of completeness, these two modules are elaborated in the remaining of this section Naeem Ramzan et al Rate allocation SVC encoder...

Ngày tải lên: 22/06/2014, 19:20

... service (QoS) support becomes difficult In this paper, we propose a complementary code- code division multiple access (CC-CDMA) -based MAC protocol for UWB WPAN system The protocol is similar to the IEEE ... assigned a spreading code by the PNC In the access period, DEVs can send their channel time requirements and other messages to the PNC based on CDMA technology Another special spreading code is assigned ... spreading code As such, DEVs are distinguished only by the relative phase shift of the code Thus, the receiver circuitry is relatively simple 3.2 Access-request packet design Complementary codes...

Ngày tải lên: 23/06/2014, 00:20

... Department - ii - March 2003 Guidelines on Performance -based Building Energy Code Preface As a supplement to the Performance -based Building Energy Code (hereafter referred to as PB-BEC), the Guidelines ... Services Department - iv - March 2003 Guidelines on Performance -based Building Energy Code Introduction 1.1 Performance -based Building Energy Code (PB-BEC) Compliance In order to comply with PB-BEC, ... - 32 - March 2003 Guidelines on Performance -based Building Energy Code 4.3 Submission forms for office building Performance -based Building Energy Code Job Ref No. Office _ Compliance...

Ngày tải lên: 28/09/2014, 23:45

... TRANSLATION QUALITY ASSESSMENT OF THE FIRST THREE CHAPTERS OF THE NOVEL “THE DA VINCI CODE BY DO THU HA (2005) BASED ON J.HOUSE’S MODEL (ĐÁNH GIÁ CHẤT LƯỢNG BẢN DỊCH BA CHƯƠNG ĐẦU TIÊN TRONG CUỐN ... novel ―The Da Vinci Code , its readers are people who are fond of thriller fiction, cryptography, fine art, and history of Christianity IV.1.3 Purpose The novel ―The Da Vinci Code was written ... content 16 IV.2 Findings of the study 17 IV.2.1 Analysis of the original text based on J House‘s model and Halliday‘s systemic-functional model 17 * Statement of...

Ngày tải lên: 02/03/2015, 14:22