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MIMO two-way relay system has demonstrated significant gain in spectral efficiency when source nodes exchange information via a relay node. This paper considers precoding algorithm when all the nodes equipped with multiple antennas. We propose an improved Tomlinson-Harashima Precoding algorithm which is assisted by lattice reduction. The advantages of both THP and lattice reduction are combined. The...
A novel method for sparsity estimation by means of the divide and conquer method is presented. Also, the underestimation and overestimation criteria for signal sparsity is proposed and proven. Then the blind-sparsity subspace pursuit (BSP) algorithm for sparse reconstruction is discussed. Based on the estimation, BSP combines the support set and inherits the backtracking refinement that attaches to...
A type of back-track algorithm has recently been proposed to handle sparse reconstruction problems arising in compressed sensing. This sort of algorithm is attractive owing to its recovery performance; however, it requires the sparsity level to be known a priori. A blind sparsity algorithm is presented based on subspace pursuit and weak pruning, and its convergence is demonstrated. The experiments...
The minimum mean square error (MMSE) Tomlinson-Harashima precoding (THP) algorithm can provide a solution for the joint transceiver of MIMO systems by pre-equalizing the interlayer interference. However, the MMSE THP algorithm can't achieve full diversity and its bit error rate (BER) performance is unsatisfactory. In this paper, an improved MMSE THP algorithm is proposed. In this algorithm, the channel...
Aiming at the problem that the anti-noise performance of the existing fast convergent and easily realized greedy iterative algorithms is deficient, a novel sparsity adaptive matching pursuit with Kalman filtering (KF-SAMP) algorithm is proposed for unknown sparsity noisy signal compressed sensing (CS) recovery. To start with, the concrete Kalman filtering (KF) equation set are come up with according...
DSP Builder is a design tool in algorithms level, which makes the algorithms realized on FPGA rapid and convenient. In this paper, by the related research on Duffing system, a digital circuit based on DSP Builder is proposed, which solves the problem that the chaotic system of analog circuit system is vulnerable to external conditions. In order to realize the digital circuit based on DSP Builder,...
The time-domain 64DAPSK-OFDM is proposed for DRM (digital radio mondiale), which offers a low-complexity reception modulation scheme. In this paper first, the AM channel model below 30 MHz is described; the modulation, demodulation and theoretical BER performance of 64DAPSK-OFDM are investigated in AWGN channel, next. Finally, through simulation results, a performance comparison between 64DAPSK-OFDM...
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