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Relay cooperative communication technology

Author: TangZhouJin
Tutor: LongPengFei；PengYuXu
School: Changsha University of Science and Technology
Course: Communication and Information System
Keywords: Multiple Input Multiple Output Collaborative communication Space diversity Cooperative relay
CLC: TN929.5
Type: Master's thesis
Year: 2011
Downloads: 55
Quote: 3
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Abstract


Spatial diversity or multi-antenna diversity techniques as easily with other diversity techniques (such as time diversity and frequency diversity) together, or in other diversity techniques can not be applied while still able to provide the system with a significant gain, but has been greatly attention. However, in the implementation process of the size, cost, power-constrained mobile terminals to achieve spatial diversity technique is more difficult. Compared to the conventional multi-antenna technology, the wireless network, the user can spare the other nodes cooperative relaying information to form a virtual multi-antenna systems using space diversity, the node can only have a single antenna can improve the system performance under the premise and resistance to fading. We call this collaborative communication. In this paper, based on related research, cooperative relay communication system for a number of key technologies in-depth research. Especially for transmit diversity based cooperative multi-point communication system, fixed network and the multi-antenna relay node incremental relaying protocol has made some progress. The main work is as follows: (4) proposed a new two-hop multi-relay cooperative communication system model to study the in iid Rayleigh fading in the selective forwarding protocol decoding multi-point symbol error cooperative relay system rate and interrupt rate performance. This paper uses the moment generating function method, by introducing hypergeometric function, detailed deduced Rayleigh fading channel multi-point collaboration communication system symbol error rate and the average rate of precise interrupts closed expressions. By Monte Carlo simulation to verify the correctness of the expression. Simulation results show that two-hop relay cooperative multi-point communication system than the traditional cooperative system has a better performance. (5) based on a fixed multi-antenna relay node program to study the distribution of the index associated with Nakagami-m channel environment, multi-antenna relay cooperative communication network performance. In this paper, based on the moment generating function (moment generating function, MGF) method of derivation of the system interrupt rate (outage probability, OP) and BER (bit error rate, BER) of closed expressions. Also studied the location of the relay nodes affect system performance. (6) proposed a multi-user base adjustable cooperative diversity relaying protocol increments, while maintaining the traditional relay protocol utilizes the broadcast nature of the wireless channel through the two-hop relay process to produce multi-user diversity gain characteristics , but also saves the channel resources will help improve system throughput.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Wireless communications > Mobile Communications
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