Multirate Layered Space-Time Coding and Successive Interference Cancellation Receivers in Quasi-Static Fading Channels

• Published in: IEEE transactions on wireless communications Vol. 6; no. 12; pp. 4524 - 4533
• Main Authors: Sellathurai, M., Ratnarajah, T., Guinand, P.
• Format: Journal Article
• Language: English
• Published: Piscataway, NJ IEEE 01.12.2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Antennas; Applied sciences; Cancellation; Channels; Codes; Communication channels; Decoding; Exact sciences and technology; Fading; Interference; Interference cancellation; MIMO; Mutual information; Outages; Performance gain; Probability density function; Radiocommunications; Receivers; Receiving antennas; Simulation; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transceivers; Transmission and modulation (techniques and equipments); Transmitters. Receivers; Turbo codes; Performance evaluation; Space-time codes; Input signal; Noise reduction; multiple-input multiple-output (MIMO) system; Packet error rate; minimum mean-square error (MMSE); Transceiver; multirate layered space-time coding; outage probability; Probability density function; Receiving antenna; Fading channels; Fading; MIMO system; Outage; outage capacity; Rayleigh channels; Quasi static theory; Multirate system; Turbo code; Decoding; Statistical method; Interference suppression; Bell-Labs layered space-time (BLAST) architecture; Simulation; Transmitting antenna; zero-forcing (ZF); Signal processing; Mutual information; Musical instrument
• ISSN: 1536-1276; 1558-2248
• DOI: 10.1109/TWC.2007.060399

We investigate the performance of multirate layered space-time coded MIMO systems with successive decoding and interference cancellation (SDIC) receivers in quasi-static Rayleigh fading channels. The proposed framework can be viewed as a class of diagonal layered space-time coded system with each of the layers is encoded independently with different rates subject to equal per-layer outage probabilities. We derive the probability density functions of the per-layer mutual informations, which can be used to estimate the per-layer rates. Using these densities we show that the proposed transceiver increases the outage capacity. We also present simulation results illustrating the outage capacity performance for a variety of transmit and receive antenna combinations and the associated near optimal per-layer rates of input signals. In particular we show that for sufficiently large numbers of transmit and receive antennas, the system can achieve near capacity in quasi-static fading environments. Based on these results, multirate codes are designed using punctured turbo codes and simulation results show significant gains in packet error-rate (PER) performances compared to that of V-BLAST architectures with lower receiver complexities.