Improved hybrid MMSE detection for turbo-trellis-coded modulation-assisted multi-user OFDM systems - Electronics Letters
نویسندگان
چکیده
A genetic algorithm assisted minimum mean-square error (MMSE) multi-user detector (MUD) is proposed for a turbo-trellis-coded modulation-based space division multiple access aided orthogonal frequency division multiplexing system. The simulation results show that the system employing the concatenated MMSE-GA MUD was capable of achieving a similar performance to that attained by its optimum counterpart employing the maximum likelihood MUD, while maintaining a significantly lower complexity, especially when supporting a high number of users.
منابع مشابه
HIPERLAN-like turbo coded multi-user detection assisted OFDM based interactive video telephony
Multiuser detection assisted, multiple transmit antenna based OFDM arrangements are studied in the context of HIPERLAN 2-like systems. It is demonstrated that the system’s user capacity can be improved with the aid of unique spatial user signatures, hence supporting a multiplicity of users. The Maximum Likelihood Sequence Estimation (MLSE) detection algorithm outperformed the Minimum Mean Squar...
متن کاملIterative Multi-User Detection for OFDM Using Biased Mutation Assisted Genetic Algorithms
Space Division Multiple Access (SDMA) aided Oralso been employed in OFDM systems [7, 8] for achieving a nearthogonal Frequency Division Multiplexing (OFDM) systems assisted optimum performance. Against this background, the novel contriby efficient Multi-User Detection (MUD) techniques have recently bution of this paper is that we propose a MMSE-assisted Iteraattracted intensive research interes...
متن کاملSIC based Multi-user Turbo Detector for Non Gray Mapping in Distributed Antenna Systems
This paper deals with the multi-user detection for non Gray mappings in an uplink-OFDM system. Joint multiuser detection is made possible through the use of distributed antenna systems. An MMSE based V-BLAST strategy is used to detect the user data. We study performance of bitinterleaved coded modulation with iterative decoding (BICMID/turbo detection) using an ITU channel model. Soft estimates...
متن کاملPerformance of Some Metaheuristic Algorithms for Multiuser Detection in TTCM-Assisted Rank-Deficient SDMA-OFDM System
We propose two novel and computationally efficient metaheuristic algorithms based on Artificial Bee Colony (ABC) and Particle Swarm Optimization (PSO) principles for Multiuser Detection (MUD) in Turbo Trellis Coded modulation(TTCM-) based Space Division Multiple Access (SDMA) Orthogonal Frequency Division Multiplexing (OFDM) system. Unlike gradient descent methods, both ABC and PSO methods ensu...
متن کاملA High Spectral Efficient Non-Binary TTCM-assisted G2 STBC-OFDM for 4G Systems
This paper deals with the MIMO-OFDM technique that candidate with the fourth generation (4G) of the wireless communication systems, this technique can provide high data rate transmission without increasing transmit power and expanding bandwidth, also it can efficiently use space resources and has a bright future. This paper presents the channel coding assisted STBC-OFDM systems, and employs the...
متن کامل