optical code division multiple access pdf
Code Division Multiple Access CDMA pdf
... 64 2.8 Multiple Access Performance of Frequency-Hopped Code Division Multiple Access 67 2.9 Summary 71 3. Cellular Code Division Multiple Access 73 3.1 Principles of Cellular Code Division Multiple ... understood orthogonal access techniques such as time division multiple access and frequency division multiple access. Additionally, random access schemes such as carrier sense multiple access are examined. In ... contention-free multiple access is in how the channels are defined. In time division multiple access (TDMA), channels are defined according to time slots. In frequency division multiple access (FDMA),...
Ngày tải lên: 27/06/2014, 14:20
Luận văn kỹ thuật cdma (code division multiple access) luận văn, đồ án, đề tài tốt nghiệp
Ngày tải lên: 25/07/2014, 09:39
Code Division Multiple Access (CDMA) phần 1 doc
... 64 2.8 Multiple Access Performance of Frequency-Hopped Code Division Multiple Access 67 2.9 Summary 71 3. Cellular Code Division Multiple Access 73 3.1 Principles of Cellular Code Division Multiple ... 22 2. Spread Spectrum Techniques for Code Division Multiple Access 23 2.1 Forms of Code Division Multiple Access 23 2.2 Direct Sequence Code Division Multiple Access 24 2.2.1 Power Spectral Density ... Communications 1 1.1 Conflict-Free Medium Access Control 2 1.1.1 Time Division Multiple Access 3 1.1.2 Frequency Division Multiple Access 5 1.1.3 Code Division Multiple Access 6 1.1.4 Traffic Engineering...
Ngày tải lên: 07/08/2014, 21:20
BÀI BÁO CÁO -Công nghệ WCDMA(wideband code division multiple access) và tình trạng triển khai
Ngày tải lên: 02/06/2015, 17:26
theory of code division muitiple access communication
... transmission. THEORY OF CODE DIVISION MULTIPLE ACCESS COMMUNICATION 1 INTRODUCTION TO CELLULAR MOBILE RADIO COMMUNICATION The subject of this book is code division multiple access (CDMA) communi- cations. ... of Code Division Multiple Access Communication, by Kamil Sh. Zigangirov ISBN 0-471-45712-4 Copyright 2004 Institute of Electrical and Electronics Engineers 1 THEORY OF CODE DIVISION MULTIPLE ... actually consists of two simplex channels. Frequency division multiple access (FDMA) and time division multiple access (TDMA) are the two major access techniques used to share the available band- width...
Ngày tải lên: 01/06/2014, 11:27
Báo cáo hóa học: " Iterative Pilot-Layer Aided Channel Estimation with Emphasis on Interleave-Division Multiple Access Systems Hendrik Schoeneich and Peter Adam Hoeher" docx
... INTRODUCTION Spread-spectrum multiple access is a popular technique al- lowing several users to share the same bandwidth at the same time. Spread spec trum is often equated with direct-sequence code- division multiple access ... multiple access capacity for Beyond 3G,” IEEE Communications Magazine, vol. 43, no. 1, pp. 61–69, 2005. [10] J. C. Fricke, H. Schoeneich, and P. A. Hoeher, “An interleave- division multiple access ... interleave -division multiple access a potential air interface for 4G bearer ser- vices and wireless LANs,” in Proceedings of the 1st IFIP Inter- national Conference on Wireless and Optical Communications Networks...
Ngày tải lên: 22/06/2014, 23:20
Báo cáo hóa học: " Bounds on the Outage-Constrained Capacity Region of Space-Division Multiple-Access Radio Systems" docx
... multiple- access system with multiple antennas at the base station. Most previous studies are constrained to either fixed channel condition [11, 12] or ergodic capacity region [13]. The space -division ... maximize the sum capacity of a time invariant Gaussian MIMO multiple- access channel. The ergodic capacity region for MIMO multiple- access channel with covariance feedback has been studied in ... acampora@ece.ucsd.edu Received 30 May 2003; Revised 5 February 2004 Space -division multiple- access (SDMA) systems that employ multiple antenna elements at the base station can provide much higher...
Ngày tải lên: 23/06/2014, 01:20
Tài liệu Lab 11.2.3d Multiple Access Lists Functions (Challenge Lab) pdf
... Outgoing access list is ________ Inbound access list is ________ Interface __________ Outgoing access list is ________ Inbound access list is ________ Interface __________ Outgoing access ... Verify the Access Lists a. Now that the access lists have been applied, they need to be verified. First, verify what lists have been defined. From a CLI session on one of the routers with access ... of the routers with access lists, display the access lists with the Boaz#show ip access- lists command. Record the information about one of the access lists. _____________________________________________________________________________________...
Ngày tải lên: 18/01/2014, 05:20
Báo cáo hóa học: " Research Article Slotted Gaussian Multiple Access Channel: Stable Throughput Region and Role of Side Information" pdf
... regarding the traffic on the stability performance of Gaussian multiple- access channels. We will focus our attention on a slotted Gaussian multiple- access channel with K users sending bursty data to a ... to the encoder at transmitter i can have any bit-sequence of length nγ i . These are encoded to 2 nγ i codewords of length n (sincewedonot know the whole statistical information,we encode only ... ensemble of i.i.d. random codes. Specifically, each user generates a codebook C (i) containing 2 nR i . = SNR r i n i codewords denoted as X (i) 1 , , X (i) SNR r i n i .Each codeword is n-length vector...
Ngày tải lên: 21/06/2014, 23:20
Báo cáo hóa học: " Cross-Layer Design of an Energy-Efficient Cluster Formation Algorithm with Carrier-Sensing Multiple Access for Wireless Sensor Networks" pdf
... C. Buratti, A. Giorgetti, and R. Verdone, “Simulation of an en- ergy efficient carrier sensing multiple access protocol for clus- teredwirelesssensornetworks,”inProc. International Work- shop on ... critical issue for energy efficiency. In the original proposal of LEACH [9, 10], a time di- vision multiple access (TDMA) schedule is defined by the CHs to ensure that there are no collisions among data ... clear- to-send (CTS) packets. When dealing with collision-prone MAC techniques, carrier-sensing multiple access (CSMA) is a usual choice in WSNs [21]. The advantage here is that no extra signalling...
Ngày tải lên: 23/06/2014, 00:20
Multiple Access Protocols for Mobile Communications - GPRS, UMTS and Beyond
... Standards 46 2.6 Summary 48 3 Multiple Access in Cellular Communication Systems 49 3.1 Multiple Access and the OSI Layers 49 3.2 Basic Multiple Access Schemes 53 3.3 Medium Access Control in 2G Cellular ... individual portions of its resources to support multiple communications, basic multiple access techniques (such as frequency-, time-, or code- division multiple access, with FDMA, TDMA, and CDMA as their ... with multiple access protocols,which govern access to these resources. The basic multiple access schemes are briefly described further below in this section, and the importance of the multiple access...
Ngày tải lên: 02/03/2013, 16:59