In this paper, the performance of OFDM systems that utilize coding and spreading is presented. The proposed systems operate in outdoor environments and achieve coding gains through the use of Low-Density Parity-Check (LDPC) encoding. It is shown here that by introducing HadamardWalsh spreading in coded OFDM, additional gain in performance can be attained relative to uncoded as well as LDPC code...

The post-deinterleaving radar pulse train problem requires estimation of the parameters and tracking of the individual pulse trains. A simple recurrent back-propagation neural network is used based on a simple state space time series formulation of the radar problem. The network incorporates a novel hueristic adap-tive error threshold that allows simultaneously good tracking and parameter estim...

This paper describes the implementation of a scalable SiGe FPGA that serves as an interleaving and deinterleaving block in a high-speed reconfigurable data acquisition system. In this paper, the different generations of SiGe configurable blocks (Basic Cells(BC)) evolved from the Xilinx 6200 are presented and measured. The latest generation has a 94% reduction in power consumption (from 71 to 4....

Electromagnetic data annotation is one of the most important steps in many signal processing applications, e.g., radar deinterleaving and mode analysis. This work considers cooperative electromagnetic from multiple reconnaissance receivers/platforms. By exploiting inherent correlation signal, as well observations receivers, a low-rank matrix recovery formulation proposed for problem. Specifical...

pulse trains deinterleaving is one of the most important tasks in es systems. in this field, fast separation and having ability to detect various types of pri is critical. in this article, a new fft-based method is proposed to deinterleave radar pulse trains. the main advantage of the proposed method compared to the previous ones is its lower computational complexity and also having less probab...

Puncturing is a way of increasing the code rate by deleting one or more parity bits in a code word without an increase in complexity. Puncturing is applied to the Turbo code scheme of Berrou et al. to increase the coding rate from 1/3 to 1/2 or higher rates. Normally, puncturing causes uneven protection due to the process of random interleav-ing. This problem can be solved with a mod-k in-terle...

A space-time serial concatenated coding approach for spectrally efficient and reliable communications over fading channels is presented. The approach is based on bit-interleaved convolutionally coded modulation with multiple transmit antennas. The decoding problem of such a scheme is addressed in frequency selective fading channels, where an iterative procedure is proposed. At the first step a ...