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Current multi-user detection scheme for sparse code multiple access (SCMA) is iterative message passing algorithm (MPA) in which the message update strategy is in a parallel manner. To take full advantage of MPA's feature of parallelism, this letter proposes a hardware implementation strategy of max-log MPA decoder used in SCMA systems with soft baseband, which is based on general-purpose computing...
Considering the intentionally introduced inter-symbol interference and coloured noise, proposed is a new signal-to-noise ratio (SNR) estimator based on the expectation-maximisation algorithm for the faster-than-Nyquist signalling system. The proposed SNR estimator can maximise the likelihood function by iteratively using the soft information from the channel decoder. Moreover, the new SNR estimator...
In this paper, two novel decoding methods are designed for two kinds of rateless codes: binary deterministic rateless (BDRC) codes and LT codes. The traditional decoding algorithms for the two kinds of codes discard the erroneous packets that may only contain few erroneous bits, which will causes the waste of bandwidth. The novel decoding methods adopt the packet combining technology to find the positions...
In this paper, we study a joint soft sparse encoding scheme for the three-node relay system. The relayed soft information is expressed basing on the Log- Likelihood-Ratios (LLRs) of the received signals at the relay. We investigate this coding method by using a regular LDPC code at the source and a sparse generator matrix at the relay. We also deliberately design the structure of the joint code by...
The single-carrier frequency division multiple access (SC-FDMA) is employed in the 3GPP Long Term Evolution (LTE) standard as the uplink transmission scheme. In this paper, we propose a novel successive interference cancellation (SIC) detector for multiuser detection in multiuser Multiple Input Multiple Output (MIMO) SC-FDMA system with co-channel interference (CCI). Compared to conventional SIC receiver,...
We investigate the design and use of systematic binary deterministic rateless (BDR) codes for information transmission over block-erasure broadcast channels. BDR codes are designed to obtain a level of maximal distance separable (MDS) properties, making these codes ideal for the considered broadcast scenario. For a certain number of encoded redundancy blocks, we derive an expression for the probability...
Cooperative diversity has recently emerged as novel communication scheme for future wireless communications because of diversity gain, which is achieved by sharing each cooperative user's antenna to form a virtual antenna array in the wireless network. Previous works on analysis of system performance of cooperative networks mainly focused on static scenarios. In this paper, we derive exact average...
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