A Cooperative Diversity Technique Using Precoding for OFDMA System in Wireless Communication
نویسندگان
چکیده
Cooperative communication has been broadly investigated to improve performance of wireless communication. But, most of the conventional cooperative techniques have a common problem of decreased transmission rate because the destination should receive the decodable compositions of symbols from the source and the relay. In this paper, we propose the new cooperative system which uses a feedback signal for orthogonal frequency division multiple access (OFDMA). This proposed scheme is free from the rate-loss and obtains additional diversity.
منابع مشابه
Performance Analysis of Wireless Cooperative Networks with Iterative Incremental Relay Selection
In this paper, an iterative incremental relay selection (IIRS) scheme is considered for wireless cooperative networks in order to increase the reliability of transmission. Different from the conventional incremental relay selection which incrementally selects a best relay for only one iteration; the IIRS scheme iteratively applies the incremental relaying and relay selection processes. To evalu...
متن کاملLink Adaptive Cooperative Communication with Smart Relays for MIMO-OFDMA
Although multiple-input multiple-output (MIMO) is advantageous on orthogonal frequency division multiple access (OFDMA) system, it may not be possible that practical systems have more than two antennas because of size and cost. Therefore, cooperative communication has been recently proposed as a way to overcome this problem in slow fading wireless environment. However, if cooperative communicat...
متن کاملA Blind Hammerstein Diversity Combining Technique for Flat Fading Channels
Diversity combining techniques play an important role in combating the destructive effects of channel fading in wireless communication systems. In this work we present a blind diversity combining technique for Rayleigh flat fading channels based on Hammerstein type filters. We show that the performance of this technique is very close to ideal MRC system which is accepted as an optimum receiver ...
متن کاملInterference Management for Future Cellular OFDMA Systems Using Coordinated Multi-Point Transmission
Todays cellular systems reach their limits for data rate due to the continuously increasing amount of subscribers using wireless service for business purposes or in leisure time (smartphone effect). Thus, recent research focuses on concepts for interference management for cellular OFDMA systems. This paper addresses various techniques related to this topic, while considering the concepts with l...
متن کاملSpace-time block-coded OFDMA with linear precoding for multirate services
Relying on space-time linearly precoded orthogonal frequency-division multiple access (OFDMA) and exploiting both transmit and receive antenna diversity, we design herein multirate transceivers that guarantee deterministic symbol recovery with diversity gains regardless of the (possibly unknown) frequency-selective finite impulse response (FIR) channels and multiuser interference. Our approach ...
متن کامل