In this paper, the combination of equalization and turbo decoding is studied. In the iterative decoding of a product code in block turbo coding system, the equalization process is performed within the iteration loop. The present study aims to investigate the decision feedback equalizer (DFE) incorporated in the iterative decoding. Simulation results show that the more severe the channel interfe...

In this paper, the combination of equalization and turbo decoding is studied. In the iterative decoding of a product code in block turbo coding system, the equalization process is performed within the iteration loop. The present study aims to investigate the decision feedback equalizer (DFE) incorporated in the iterative decoding. Simulation results show that the more severe the channel interfe...

In this paper, two new hybrid algorithms are proposed for decoding Low Density Parity Check (LDPC) codes. Original version of the proposed algorithms named Search Based Weighted Multi Bit Flipping (SWMBF). The main idea of these algorithms is flipping variable multi bits in each iteration, change in which leads to the syndrome vector with least hamming weight. To achieve this, the proposed algo...

In this paper, two new hybrid algorithms are proposed for decoding Low Density Parity Check (LDPC) codes. Original version of the proposed algorithms named Search Based Weighted Multi Bit Flipping (SWMBF). The main idea of these algorithms is flipping variable multi bits in each iteration, change in which leads to the syndrome vector with least hamming weight. To achieve this, the proposed algo...

We propose a new hybrid ARQ scheme that utilizes reliability estimates generated by soft-input, soft-output (SISO) decoders. The ARQ scheme that we propose transmits additional information for the unreliable bits, and this information is used to do additional decoding. We present results that show this ARQ technique can provide performance close to the channel capacity. SISO decoders can be use...

A hybrid concatenated code with two interleavers is the parallel concatenation of an encoder, which accepts the permuted version of the information sequence as its input, with a serially concatenated code, which accepts the unpermuted information sequence. The serially concatenated code consists of an outer encoder, an interleaver, and an inner encoder. An upper bound to the average maximum-lik...

Hybrid decoding is to combine different iterative decoding algorithms with the aim of improving error performance or decoding complexity. This, e.g., can be performed by using a specific blend of different algorithms in every iteration (time-invariant hybrid: HTI), or by switching between different algorithms throughout the iteration process (switch-type hybrid: HST). In this work, we study HTI...

Turbo decoders inherently have a large latency and low throughput due to iterative decoding. To increase the throughput and reduce the latency, high speed decoding schemes have to be employed. In this paper, following a discussion on basic parallel decoding architectures, two types of area-efficient parallel decoding schemes are proposed. Detailed comparison on storage requirement, number of co...