OFDM-CDM with V-BLAST detection and its extension to MIMO systems
نویسندگان
چکیده
Abstract— In this paper, we propose the use of verticalBell Labs layered space-time (V-BLAST) detection for orthogonal frequency division multiplexing code division multiplexing (OFDM-CDM) systems. Considering the properties of the VBLAST detection as well as the frequency diversity from CDM, we propose a new CDM transform matrix to improve the performance of V-BLAST detection of OFDM-CDM signals. The V-BLAST detection of OFDM-CDM signals is also applied in multiple antenna systems. Simulation results show that we can achieve significant performance improvement using the V-BLAST detection scheme and the proposed CDM transform matrix for OFDM-CDM systems.
منابع مشابه
Selective Tone Reservation method for PAPR reduction in SFBC-OFDM systems
The high Peak to Average Power Ratio (PAPR) of Orthogonal Frequency Division Multiplexing (OFDM) and MIMO-OFDM systems reduces the system efficiency. In this paper, an extension of Tone Reservation (TR) method is introduced for PAPR reduction in Space Frequency Block Coded OFDM (SFBC-OFDM) systems. The proposed algorithm is based on a time domain kernel which is added to the signal of the anten...
متن کاملPer-antenna-coded schemes for MIMO OFDM
Two Per-Antenna-Coding (PAC) receiver schemes for Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) are described and compared in this paper. In MIMO, the data to transmit are multiplexed onto different antennas. With PAC (sometimes called horizontal coding), these different data streams are encoded separately. For the receiver, two schemes are proposed to ...
متن کاملOn MIMO-OFDM with Coding and Loading
Orthogonal frequency-division multiplexing (OFDM) with multiple transmit and multiple receive antennas (MIMO-OFDM) is considered a candidate for high-data rate communication in various existing and forthcoming system standards. To achieve the usually desired low frame and bit error rates, MIMO-OFDM should be combined with adaptive bit loading (ABL) and forward error correction (FEC) coding, whe...
متن کاملLattice-reduction-aided detection for MIMO-OFDM-CDM communication systems
Multiple input multiple output-orthogonal frequency division multiplexing-code division multiplexing (MIMO-OFDM-CDM) techniques are considered to improve the link reliability/spectral efficiency of very high data rate communication systems. In particular, lattice-reduction-aided receivers are proposed for MIMO-OFDM-CDM systems. Simulation results show that the proposed receivers significantly o...
متن کاملPerformance Improvement of MIMO-OFDM Systems using V-blast and STBC
-The mobile communication systems with data rates more than 1gbps has dramatically increased in recentyears. New techniques are employed to improve the performance of MIMO systems. MIMO systems with multiple antenna elements at transmitter side and receiver side is the promising technology and future for the 4G wireless systems .The techniques that can be applied to MIMO-OFDM systems are V-BLAS...
متن کامل