Frequency-Domain Receivers for Rate-1 Space-Time Block Codes

Mário Marques Da Silva,Rui Dinis,Américo M C Correia

doi:10.4236/ijcns.2009.29098

Abstract

This paper considers iterative frequency-domain receivers for block transmission techniques with rate-1 Space Time Block Coding (STBC) for two and four transmit antennas using both Orthogonal Frequency Division Multiplexing (OFDM) and Single-Carrier (SC) schemes. The proposed receiver includes an interference canceller which enhances the performance of the non-orthogonal STBC scheme with 4 transmit antennas, allowing performances close to those of orthogonal codes. Our performance results show that combining STBC with block transmission techniques allows excellent performances.

Highlights

Block transmission techniques, with appropriate cyclic prefixes and employing FDE techniques (FrequencyDomain Equalization), have been shown to be suitable for high data rate transmission over severely time-dispersive channels [1,2]
This paper considers iterative frequency-domain receivers for block transmission techniques with rate-1 Space Time Block Coding (STBC) for two and four transmit antennas using both Orthogonal Frequency Division Multiplexing (OFDM) and Single-Carrier (SC) schemes
OFDM transmission technique has been selected for the downlink of Long Term Evolution (LTE) in Release 8 of Third Generation Partnership Project (3GPP), as opposed to WCDMA which is the air interface technique that has been selected by European Telecommunications Standard Institute (ETSI) for UMTS

Summary

Introduction

With appropriate cyclic prefixes and employing FDE techniques (FrequencyDomain Equalization), have been shown to be suitable for high data rate transmission over severely time-dispersive channels [1,2]. A promising Iterative Block–Decision Feedback Equalization technique (IB-DFE) for SC-FDE was proposed in [3] and extended to other scenarios in [4] and [5]. These IB-DFE receivers can be regarded as iterative DFE receivers where the feedforward and the feedback operations are implemented in the frequency domain, enhancing the performance as compared to non-iterative methods [3,4,5]. We consider transmit diversity schemes for both OFDM and SC-FDE schemes, the STBC with two [6,7] and four antennas [11,12]. A set of performance results is presented in Section 4 and Section 5 contains the conclusions of this paper

Space Time Block Coding for Two Antennas

Space Time Block Coding for Four Antennas

Receiver Design

Performance Results

Conclusions