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Multi-user cooperative communications networks and performance study

Author: LiJingYe
Tutor: ShaoYuBin
School: Kunming University of Science and Technology
Course: Communication and Information System
Keywords: Cooperative communications Cognitive radio Outage probability BER
CLC: TN915.0
Type: Master's thesis
Year: 2010
Downloads: 37
Quote: 0
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Abstract


In the field of wireless communications , multipath fading has been a fatal factor affecting quality of communication , cooperation, diversity techniques to solve this problem brought the gospel. Cooperative diversity technology is a new distributed spatial diversity techniques , communications specialists in recent years has been embraced as the key to the next generation of wireless communication network technology, cited by some foreign experts in spectrum sensing cognitive radio systems and spectrum sharing technology . Now commonly used in cooperative diversity techniques are mainly amplify and forward relay protocol decode forward relay protocol, select relay coding agreement and cooperation agreements. This paper introduces the concept of cooperative diversity , compared to the commonly used cooperative diversity protocol performance ; Then iid fading channel decoding forward relay protocol analysis outage probability and bit error rate performance , and has been in the mix channel outage probability and bit error rate of the general expression ; multi-user collaboration discussed after the communication network performance analysis of a single -user multi- relay system outage probability and bit error rate characteristics , in a multi- user multi- relay cooperative communication network cooperative coding protocol used and improved adaptive coding protocol cooperation and collaboration proved adaptive coding protocol on system reliability brings positive gain , while establishing a multi- source multi-relay multi-purpose terminal cooperative diversity model , and initially proposed several solutions ; Finally, in the cognitive radio systems model of cognitive client to establish cooperation proved cooperative diversity techniques can improve the sensitivity of cognitive radio systems , and proved to have a sense of cooperation can not only improve cognitive users spectrum efficiency, but also improve overall system throughput.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > Communicate > Communication network > General issues
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