Mobile underwater acoustic communications with multicarrier modulation in very shallow waters

... velocity profile in warm shallow waters off Singapore Figure 2.2: Shallow water multipath model with up to reflections 10 Figure 2.3: Typical Ambient noise profile in warm shallow waters 14 ... Besides fading which leads to temporal loss in acoustic intensity, two other major factors lead to an overall attenuation of acoustic signals with increasing distance from the s...

Ngày tải lên: 26/11/2015, 12:30

... operations, ocean bottom monitoring stations, remote mine hunting and underwater structure inspections have driven the need for underwater wireless communications Sound transmission is the single ... fading and long delay channels, Heo [30] proposed channel estimate based tap initialization and sparse equalization to hasten the convergence process This result in faster initial and nomi...

Ngày tải lên: 26/11/2015, 13:03

... to I and Q components determining I and Q values for each symbol (“slicing”) decoding and de-interleaving expansion to original bit stream digital- to-analog conversion, if required In more and ... channel coding is added Channel coding encodes the data in such a way as to minimize the effects of noise and interference in the communications channel Channel coding adds extra bits to t...

Ngày tải lên: 26/01/2014, 04:20

... to I and Q components determining I and Q values for each symbol (“slicing”) decoding and de-interleaving expansion to original bit stream digital- to-analog conversion, if required In more and ... Shift Keying) is used in many applications including cordless and paging systems Some of the cordless systems include DECT (Digital Enhanced Cordless Telephone) and CT2 (Cordless Telephon...

Ngày tải lên: 31/03/2014, 07:20

... pursuing towards the doctoral degree His main research interests are digital signal processing algorithms for multicarrier and frequency domain equalized single-carrier modulation -based wireless communications, ... doctoral degree there His research interests include wireless communications based on multicarrier systems, especially focusing on filter bank based systems...

Ngày tải lên: 22/06/2014, 23:20

... Bandwidth- Efficient Digital Modulation with Application to Deep - Space Communications Marvin K Simon MONOGRAPH DEEP–SPACE COMMUNICATIONS AND NAVIGATION SERIES Bandwidth- Efficient Digital Modulation ... Martin Haiping Tsou Tsun-Yee Yan of the Jet Propulsion Laboratory MONOGRAPH DEEP–SPACE COMMUNICATIONS AND NAVIGATION SERIES Bandwidth- Efficient Digital Modulation...

Ngày tải lên: 03/07/2014, 21:12

... noise in Receiver Cross Modulation Noise EXCEEDS Thermal noise ! CROSS MOD NOISE LNA IP3 and DUPLEXER ISOLATION REDUCE INCREASE Page Cross Modulation in CDMA Mobile Phone Tranceivers In a CDMA mobile ... nonlinearity of the LNA •4 /17 / 01 H Cross Modulation in IS-95 CDMA Mobile Phone Pjam Prx = -30 dBm = -10 1 dBm RECEIVER LRX = dB LNA RX Band Filter LT...

Ngày tải lên: 07/08/2014, 21:20

... basically AM modulation, and it is another definition of cross modulation Using this definition, it is easier to see how the LNA can be linearized for minimizing cross modulation 20 ... with cross modulation Cross modulation is only an amplitude modulation effect Secondly, the in- band cross modulation noise only occupies about half of the 1 .23 MHz span, and after de...

Ngày tải lên: 07/08/2014, 21:20

... resulting in significant increase in the receiver channel cross mod noise To greately reduce cross modulation, the total gain of the jammer should be made time independent This can be done by linearily ... dBm, and the single tone jammer power was -33 dBm According to the earlier derived cross modulation noise model for Cellular band, the cross modulation noise power should b...

Ngày tải lên: 07/08/2014, 21:20

... Underwater MAC Protocols We first focus on the existing underwater handshaking- based MAC protocols; then, we shall briefly describe some proposals for non -handshaking protocols Handshaking- based MAC protocols ... benchmarking protocol for more advanced underwater handshaking- based MAC protocols We aim to enhance channel utilization of handshaking- base...

Ngày tải lên: 09/09/2015, 18:49

... overloading and singlepoint of failure Finally, the current inter-domain multicast faces one nagging problem in the area of managing large IP inter-domain multicast routing tables 1.2 Data- In- Network ... IP Inter-domain Multicast A nagging problem with IP multicast is large IP multicast routing tables The problem of large IP multicast routing tables also exists in the in...

Ngày tải lên: 12/09/2015, 10:37

... alternative to time domain equalizers is their frequency domain counterparts Frequency domain equalizer for OFDM with insufficient CP are covered in [26; 27; 28] Among the frequency domain equalizers ... reflection point for the signal induced by the surface waves [31] Figure 2.1: Cyclic Prefix inserted at the front of an OFDM symbol in time domain Figure 2.1 sho...

Ngày tải lên: 13/10/2015, 15:56

... Wizard, which is new in Visual Studio 2008 for client- side RS Chapter 15: Reporting with Visual Studio 2008 Web Forms Finally, I am using this last chapter to develop reports with a Visual Studio 2008 ... service This is often called business-to-business (B2B) communication Client- side reporting supports both types of activities Vendors interact with businesses...

Ngày tải lên: 20/08/2012, 13:42

... 3.2.2 How Vietnamese staff communicate with their foreign colleagues .29 CHAPTER 4: DISCUSSION AND RECOMMENDATIONS ON HOW TO COMMUNICATE MORE EFFECTIVELY WITH FOREIGN COLLEAGUES IN FOREIGN ORGANIZATIONS ... Explaining means to clarify something in more details and more simply Interpreting is to expound or in other words, to repeat the message in o...

Ngày tải lên: 27/10/2012, 16:44