The 12th International Symposium on Wireless Personal Multimedia Communications (WPMC’09) A NOVEL COMBINING RECEIVER FOR A DUAL-DIVERSITY WIRELESS RELAY NETWORK
نویسندگان
چکیده
We present a simple combining receiver for a dual-diversity wireless relay network. The main concern of the paper is to face the trade-off between performance and complexity. The receiver focuses on signal-to-noise ratio (SNR) monitoring and selects dynamically between selection combining (SC) and equal gain combining (EGC) depending on the SNR ratio of the two received branches. It is shown that SC suffers no SNR degradation compared to a single branch communications system if the two receive branches are unbalanced, wheres EGC suffers a loss of 3 dB. Error performance with respect to branch unbalance is considered as well and limiting values for a high degree of branch unbalance are derived.
منابع مشابه
The 12th International Symposium on Wireless Personal Multimedia Communications (WPMC’09) CROSS-LAYER MAC DESIGN FOR BANDWIDTH ALLOCATION IN WIRELESS AD HOC NETWORKS
To support rate allocation schemes for wireless ad hoc networks at the MAC layer, a cross-layer MAC protocol is proposed in this paper to coordinate transmissions among flows and guarantee their allocated rates. Two different algorithms are implemented in this protocol: the first one is able to support an arbitrary bandwidth allocation scheme but has a longer convergence time, while the second ...
متن کاملThe 11th International Symposium on Wireless Personal Multimedia Communications (WPMC 2008) MOBILITY SCENARIOS FOR THE FUTURE INTERNET: THE 4WARD APPROACH
The project 4WARD 1 addresses the challenges of future networks by combining innovative networking concepts that go beyond the evolution of the contemporary Internet. The aim is to revolutionize in particular the current way of communication over wireless for mobile applications. In this position paper, we discuss how the role of mobility has been changing over time and how it now generates som...
متن کاملThe 12th International Symposium on Wireless Personal Multimedia Communications (WPMC’09) PERFORMANCE GAINS FOR SPECTRUM UTILIZATION IN COGNITIVE RADIO NETWORKS WITH SPECTRUM HANDOFF
Cognitive radio (CR) can improve spectrum utilization by allowing the secondary users to temporarily access the primary users’ unutilized licensed spectrum. In order to guarantee quality of service (QoS) of the secondary users, spectrum handoff mechanism must be implemented in CR networks. Spectrum handoff procedures aim to help the secondary users vacate the spectrum and search the target chan...
متن کاملThe 12th International Symposium on Wireless Personal Multimedia Communications (WPMC 2009) A COMPARATIVE STUDY ON THE TRANSMIT POWER CONTROL SCHEMES FOR MULTI-USER MIMO SYSTEM
The capacity performance of multi-user multiple input multiple output (MIMO) in a cellular system is of a great interest. This paper presents a comparative study on the transmit power control (TPC) schemes for uplink multi-user MIMO systems. Two kinds of TPC schemes, namely, zero-outage TPC and minimum interference TPC, are considered. The capacities of both schemes are theoretically analyzed a...
متن کاملSpecial Issue on: Cooperative and Distributed Wireless Communications
Recent advances in radio technology as well as in hardware and software design have resulted in new possibilities for future mobile communication networks. Among those, cooperative communications among the peer nodes of a cellular network could create much anticipated improvement in coverage and capacity of the cellular systems. Such cooperation would generate a distributed network topology whe...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2009