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The recently proposed subset-based coherent fast frequency hopping (S-CFFH) scheme enables reliable channel estimation for FFH over fading channel. With S-CFFH/16-QAM, we propose the optimum and suboptimum maximum-likelihood (ML) receivers in the presence of partial band noise jamming (PBNJ), frequency-selective Rayleigh fading, and Gaussian channel estimation errors. We analyze the bit error ratio...
The subset-based coherent fast frequency hopping (S-CFFH), was recently proposed to enable reliable channel estimation and coherent schemes for FFH over fading channels. In this paper, we analyze the maximum-likelihood (ML) receiver for the S-CFFH/binary phase shift keying (BPSK), with partial band noise jamming (PBNJ), frequency selective Rayleigh fading, and imperfect channel state information (CSI)...
We consider relay selection technique in a cooperative cellular network where user terminals act as mobile relays to help the communications between base station (BS) and mobile station (MS). A novel relay selection scheme, called Joint Uplink and Downlink Relay Selection (JUDRS), is proposed in this paper. Specifically, we generalize JUDRS in two key aspects: (i) relay is selected jointly for uplink...
Conventional distributed Alamouti-like space-time block codes (STBC) transmission strategy in two-user cluster-based cooperative communication systems (Sushanta and Monisha, 2008) is extended to single-carrier frequency-domain equalization (SC-FDE) systems, and a two-user cooperative transmission scheme in distributed frequency division multiple access (DFDMA) systems is proposed for uplink wireless...
A new two-user cooperative transmission scheme with low-complexity frequency-domain equalization (FDE) for single carrier frequency division multiple access (SC-FDMA) systems in localized subcarrier mapping mode is proposed for uplink wireless transmission in this paper. At the destination, each user's information can be obtained with a simpler diversity combing and a lower-complexity FDE than existing...
Cooperative diversity enables single antenna transmitter in a multi-user or relay environment to share the antennas so as to achieve diversity gain. In this work, the cooperative communication system with distributed Alamouti code is investigated, where amplify-and-forward (AF), adaptive decode-and-forward (DF) or hybrid AF/DF are used at the relay, with both Rayleigh fading and path loss effect introduced...
In this paper we investigated interference pre-subtraction problems in multi-users downlink channel for multiple-antennas OFDM system, in which the number of users is larger than the number of transmit antennas. We present a new jointly spatial loading and preceding strategy to select reasonably a group of users for each tone on each transmit antenna by maximizing signal to interference and noise...
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