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whitepaper Spatial multiplexing with linear precoding is a simple technique to take advantage of the high spectral efficiency provided by multiple-input multiple-output (MIMO) systems, and it can be simply implemented over frequency selective channels by...
[10 Apr 2008]
whitepaper Orthogonal frequency-division multiplexing (OFDM) converts a frequency-selective fading channel into parallel flat-fading subchannels, thereby simplifying channel equalization and symbol decoding. However, OFDM's performance suffers from the loss...
[10 Apr 2008]
whitepaper It shows the relationship between this method and filterbank precoding system as well as linearly precoded OFDM. These solutions inherit the fast implementation of OFDM and the superior performance of linear precoding system.
[10 Apr 2008]
whitepaper Multiple-Input Multiple-Output (MIMO) wireless systems obtain large diversity and capacity gains by employing multielement antenna arrays at both the transmitter and receiver. The theoretical performance benefits of MIMO systems, however, are...
[31 Aug 2007]
whitepaper Multiuser spatial multiplexing uses precoding to support multiple users in multi-antenna wireless channels. In this paper, two transmit diversity techniques are proposed that use extra transmit antennas to obtain additional diversity.
[21 Aug 2007]
whitepaper Multiuser spatial multiplexing uses precoding to support multiple users in multi-antenna wireless channels. In this paper, two transmit diversity techniques are proposed that use extra transmit antennas to obtain additional diversity.
[21 Aug 2007]
whitepaper Multiple-Input Multiple-Output (MIMO) wireless systems obtain large diversity and capacity gains by employing multielement antenna arrays at both the transmitter and receiver. The theoretical performance benefits of MIMO systems, however, are...
[10 Aug 2007]
whitepaper This paper extends the PAR optimization technique to Multiple-Input Multiple-Output (MIMO) OFDM systems with channel precoding. Recent work has used convex optimization to minimize the Peak-to-Average power Ratio (PAR) of OFDM signals subject to a...
[07 Aug 2007]
whitepaper Spatial multiplexing with multi-mode precoding provides a means to achieve both high capacity and high reliability in Multiple-Input Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems.
[26 Apr 2007]
whitepaper A precoding approach for reduced complexity channel estimation for OFDM systems with transmit diversity is presented. Two different OFDM schemes that employ the precoding are investigated: the first one is based on space-time coding, the second is...
[13 Apr 2007]
whitepaper A novel approach of blind channel estimation for OFDM systems is proposed. A linear transformation is applied on each block before it enters the OFDM system. The transform imposes a correlation structure on the transmitted blocks, which is...
[13 Apr 2007]
whitepaper This paper considers a novel approach that can be applied on a single transmit/receive antenna OFDM system, to increase multipath diversity, and at the same time, enable blind channel estimation at the receiver.
[13 Apr 2007]
whitepaper Depending on the channel realization, the receiver selects the optimal beamforming vector or precoding matrix from a finite-size codebook on each subcarrier, and informs the transmitter through finite-rate feedback.
[13 Apr 2007]
whitepaper This paper develops linear precoding schemes for the downlink in multiuser Multiple-Input Multiple-Output (MIMO) Orthogonal Frequency Division Multiplexing (OFDM) systems with multiple data streams per user.
[11 Apr 2007]
whitepaper Spatial multiplexing with multi-mode precoding can achieve both high capacity and high reliability in Multiple-Output Orthogonal Frequency Division Multiplexing (MIMO-OFDM) systems. Multimode precoding uses linear transmit precoding but adapts the...
[11 Apr 2007]
whitepaper Multiple Input Multiple Output (MIMO) wireless systems can offer significant diversity and transmit beamforming with receive combining provides a method to achieve this diversity with simple receive processing.
[11 Apr 2007]
whitepaper With known pilots inserted before precoding, the authors resolve the residual scalar ambiguities and show that distinct precoders require less pilots than identical precoders to achieve the same channel estimation accuracy.
[11 Apr 2007]
whitepaper In this paper, a linear precoding technique is proposed in order to solve this problem. Multiuser wireless communications based on Orthogonal Frequency Division Multiplexing (OFDM) technique have two pronouncing advantages.
[11 Apr 2007]
whitepaper Both burdens can be answered in the downlink by precoding the signal with the knowledge of the channel state information. The results show for a SISO system a significant improvement over recent proposed precoding schemes.
[16 Feb 2006]
whitepaper A novel linear precoding method that combines Multiuser Interference (MAI) cancellation, pre-RAKE filtering and Transmitter (Tx) antenna diversity is proposed for the downlink of the Code Division Multiple Access (CDMA) channel.
[06 Oct 2005]
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