Now showing items 61-66 of 66
An Efficient Circulant MIMO Equalizer for CDMA Downlink: Algorithm and VLSI Architecture
(Hindawi Publishing Corporation, 2006-02-01)
We present an efficient circulant approximation-based MIMO equalizer architecture for the CDMA downlink. This reduces the direct matrix inverse (DMI) of size (NF×NF) with O((NF)3) complexity to some FFT operations with ...
HIGH THROUGHPUT, PARALLEL, SCALABLE LDPC ENCODER/DECODER ARCHITECTURE FOR OFDM SYSTEMS
This paper presents a high throughput, parallel, scalable and irregular LDPC coding and decoding system hardware implementation that supports twelve combinations of block lengths 648, 1296, 1944 bits and code rates 1/2, ...
High-Throughput Multi-rate LDPC Decoder based on Architecture-Oriented Parity Check Matrices
A high throughput pipelined LDPC decoder that supports multiple code rates and codeword sizes is proposed. In order to increase memory throughput, irregular block structured parity-check matrices are designed with the ...
Frequency-Domain ICI Estimation, Shortening, and Cancellation in OFDM Receivers
Orthogonal frequency division multiplexing (OFDM) communication systems encounter performance limitations due to time-varying channels common in wireless applications. The channel variations introduce inter-carrier ...
Soft Sphere Detection with Bounded Search for High-Throughput MIMO Receivers
We propose the design of soft sphere detection with the search method independently bounded for specific search levels (transmit antennas). The bounds are based on the distribution of the candidates found in each search ...
Wavelet-Domain Approximation and Compression of Piecewise Smooth Images
The wavelet transform provides a sparse representation for smooth images, enabling efficient approximation and compression using techniques such as zerotrees. Unfortunately, this sparsity does not extend to piecewise smooth ...