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Space-Frequency Coded MIMO-OFDM With Variable Multiplexing-Diversity Tradeoff
White Papers Space-frequency coded Orthogonal Frequency Division Multiplexing (OFDM) is capable of realizing both spatial and frequency-diversity gains in multipath multiple-input multiple-output (MIMO) fading channels.
[January 1, 1970, 0:59]
Impact Of The Propagation Environment On The Performance Of Space-Frequency Coded MIMO-OFDM
White Papers In this paper, using a broadband MIMO channel model taking into account Ricean K-factor, transmit and receive angle spread, and antenna spacing, we study the impact of the propagation environment on the performance of space-frequency coded MIMO-OFDM.
[January 1, 1970, 0:59]
Space-Frequency Bit-Interleaved Coded Modulation For MIMO-OFDM
White Papers This paper presents the design of a novel space-frequency bit-interleaver for MIMO-OFDM systems. The proposed Space-Frequency Interleaver (SFI) interleaves convolutionally coded bits across transmit antennas and frequency tones.
[January 1, 1970, 0:59]
Noncoherent Space-Frequency Coded MIMO-OFDM
White Papers Recently, the use of coherent space-frequency coding in orthogonal frequency division multiplexing (OFDM)-based frequency-selective multiple-input multiple-output (MIMO) antenna fading channels has been proposed.
[January 1, 1970, 0:59]
Space-Frequency Bit-Interleaved Coded Modulation For MIMO-OFDM/OFDMA Systems
White Papers This paper proposes space-frequency bit-interleaved coded modulation (SF-BICM), which provides both frequency diversity and spatial diversity by interleaving coded bits across transmit antennas and frequency tones.
[January 1, 1970, 0:59]
Layered Turbo Space-Time Coded MIMO-OFDM Systems For Time Varying Channels
White Papers A joint detection-estimation scheme is proposed in this paper for multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) systems. The transmitter employs a layered turbo space-time code.
[January 1, 1970, 0:59]
Adaptive Channel Estimation For Space-Time Block Coded MIMO-OFDM Communications
White Papers In this paper an adaptive channel estimation technique has been developed for MIMO STBC-OFDM transmissions over frequency selective fading channels. In particular, the paper shows that the channel estimation for OFDM-STBC collapses to the problem...
[January 1, 1970, 0:59]
Performance Analysis And Design Optimization Of LDPC-Coded MIMO OFDM Systems
White Papers This paper considers the performance analysis and design optimization of Low-Density Parity Check (LDPC) coded Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency-Division Multiplexing (OFDM) systems for high data rate wireless transmission.
[January 1, 1970, 0:59]
Diversity Analysis For Frequency-Selective MIMO-OFDM Systems With General Spatial And Temporal Correlation Model
White Papers For the space-frequency coded MIMO-OFDM system, it is shown that any space-frequency code designed to achieve full diversity in the independent fading channel can achieve full diversity in an arbitrary spatially correlated channel.
[January 1, 1970, 0:59]
Receiver Design For MIMO-OFDM Transmission Over Time Variant Channels
White Papers This paper considers receiver design for Space Time Block Coded MIMO OFDM transmission over frequency selective time-variant channels. The receiver employs the expectation-maximization (EM) algorithm for joint channel and data recovery.
[January 1, 1970, 0:59]
A Low Complexity Space-Frequency BICM MIMO-OFDM System For Next-Generation WLANs
White Papers This paper proposes a low complexity Space-Frequency Bit Interleaved Coded (SF-BICM) Multiple-Input Multiple-Output (MIMO) OFDM system as a promising candidate for Next Generation Wireless LANs, expected to operate in excess of 100Mb/s.
[January 1, 1970, 0:59]
Diversity Analysis Of Space-Time-Frequency Coded Broadband OFDM Systems
White Papers This paper proposes a general framework for the performance analysis of space-time-frequency coded MIMO-OFDM systems. The approach presented in this paper incorporates the space-time and space-frequency coding approaches as special cases.
[January 1, 1970, 0:59]
Performance Of Joint Detection Techniques For Coded MIMO-OFDM And MIMO-MC-CDM
White Papers This paper considers a coded transmission over a time-invariant MIMO channel where channel state information is present at the receiver but not at the transmitter. In the case of MIMO-OFDM crosstalk only occurs because of the use of multiple...
[January 1, 1970, 0:59]
Performance Of Space-Frequency Techniques Over Measured Channels In MIMO-OFDM Systems
White Papers This paper examines the performance of some recently proposed Space-time coding and signal processing techniques when applied to Orthogonal Frequency Division Multiplexing (OFDM) in Multiple Input Multiple Output (MIMO) configuration.
[January 1, 1970, 0:59]
A Software And Hardware Evaluation Of Revolutionary Turbo MIMO OFDM Schemes For 5GHz WLANs
White Papers Multiple Input Multiple Output (MIMO) antenna architectures coupled with Soft Input Soft Output (SISO) iterative decoding algorithms represent a revolutionary approach to the design of WLANs. In this contribution, the performance of a newly...
[January 1, 1970, 0:59]
Space-Frequency Turbo Coded OFDM For Future High Data Rate Wideband Radio Systems
White Papers Owing to its maximum transmit diversity gain and large coding gain, space-frequency turbo coded modulation is demonstrated to perform within 2.5 dB of the 10% outage capacity for the variety of practical wideband MIMO radio channels, strongly...
[January 1, 1970, 0:59]
Space-Frequency Turbo Coded OFDM
White Papers Owing to its maximum transmit diversity gain and large coding gain, space-frequency turbo coded modulation is demonstrated to perform within 2.5 dB of the 10% outage capacity for the variety of practical wideband MIMO radio channels, strongly...
[January 1, 1970, 0:59]
A Channel Estimation Method For MIMO-OFDM Systems
White Papers This paper proposes a simple and efficient method for MIMO-OFDM channel estimation using parameters similar to HIPERLAN/2. Both preamble and pilot structures are compared in a 2 transmit-2 receive Space Frequency Trellis Coded system and the Mean...
[January 1, 1970, 0:59]
Comparison Of Vector Detection Algorithms For MIMO-OFDM
White Papers The aim of this paper is to compare detection algorithms for MIMO-OFDM transmissions by simulation. Moreover, iterative equalization techniques based on soft interference cancellation connected with decoding via the well-known turbo principle can...
[January 1, 1970, 0:59]
Comparison Of Iterative Detection Schemes For MIMO Systems With Spreading Based On OFDM
White Papers This paper considers a coded transmission over a time-invariant MIMO channel, where channel state information is present at the receiver but not at the transmitter. In addition to MC-CDM spreading techniques, the paper introduces a new class of...
[January 1, 1970, 0:59]
