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A soft-input soft-output non-coherent detection algorithm is proposed for multi-antenna systems, where differential space-time block code is employed. The proposed algorithm aims to calculate a posteriori probabilities of the information bits by means of forward and backward message passing of the BCJR approach. The proposed algorithm can exploit the soft information effectively with the aid of the...
Existing inter-frame interference (IFI) and intersymbol interference (ISI) mitigation schemes for noncoherent UWB Impulse Radio (UWB-IR) mainly focus on signal processing after nonlinear autocorrelation receiver (AcR) or energy detector (ED). Steering the wheel, a simple but effective IFI and ISI pre-mitigation scheme is proposed in this paper, which realizes IFI and ISI mitigation before ED. Block...
In mobile communication, space is a very important domain to use. Two kinds of leading techniques are beamforming and STBC in MIMO system. This paper investigates the relation between beamforming and STBC at the capacity perspective. Both techniques can improve system performance at the cost of the capacity, which shows that they convert the matrix channel into a scalar AWGN channel. At low SNR, the...
In this paper, two novel space-time coded modulation and corresponding noncoherent detection schemes for Ultra-Wideband (UWB) impulse radio system are proposed. An additional orthogonality is introduced to original Orthogonal Space-Time Block Code (OSTBC) for performance enhancement in the proposed two schemes, which is termed as Dual Orthogonal Space-Time Coded Modulation (DOSTCM). The specially...
This paper presents a new scheme of joint equalization and interference cancellation by single carrier frequency domain equalization (SC-FDE) for Alamouti-like space-time block-coded (STBC) transmissions in distributed cooperative diversity networks with frequency-selective fading channels. The communication process in this scheme followed that the source terminal adopted broadcasting mode to communicate...
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