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In this paper, we propose a throughput optimization scheme for relay protocols based on Adaptive Modulation and Coding (AMC). The performance of relay protocols with the AMC scheme and show that relay protocols with the AMC scheme are capable of providing better average throughput at a lower Signal to Noise Ratio (SNR) level as compared to the conventional scheme with no AMC. We perform 3GPP Long...
In this paper, a novel enhancement of the well known ALOHA random access mechanism is presented which largely extends the achievable throughput compared to traditional ALOHA and provides significantly lower packet loss rates. The novel mechanism, called Constant Rate Assignment (CRA), is based on transmitting multiple replicas of a packet in an unslotted ALOHA system and applying interference cancellation...
We propose a rateless coded protocol for a half-duplex wireless relay channel where all links experience independent quasi-static Rayleigh fading. The protocol utilizes a combination of rateless coded decode-forward and compress-forward relaying schemes. Assuming very limited feedback from the destination, we derive the theoretical performance limits specifically with BPSK modulation. We then implement...
In this paper, we are concerned with the design and analysis of joint source-channel coding schemes for block fading channels with relay-assisted distributed spatial diversity. Assuming a progressive image coder with a constraint on the transmission bandwidth, we formulate a joint source-channel rate allocation scheme that maximizes the expected source throughput. Specifically, using Gaussian as well...
In this paper, a new type-II hybrid ARQ (HARQ) scheme based on TCM and concatenated codes is proposed and evaluated. The new scheme is divided into two major steps which are BCH processing and turbo processing. Firstly, information bits are transmitted using TCM and then the incremental parity bits based on BCH codes are transmitted upon the reception of NAK. Secondly, the incremental redundancy (IR)...
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