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In this letter, we investigate the symbol error rate(SER) performance of multi-carrier (MC) double space-time transmit diversity (DSTTD) system for the transmission of acoustic signals in underwater communication. In our work, we consider the problems of mitigating the effects of multipath propagation, acoustic interference and ambient noise in underwater communications. We realize DSTTD architecture...
Cell search has to be performed by the user equipment in 3GPP Long Term Evolution (LTE) systems to obtain cell identity before connecting to the cell. The cell identity is transmitted using the Primary Synchronization Symbol (PSS) and the Secondary Synchronization Symbol (SSS). The PSS carries one of three possible values for the sector identity whereas the SSS carries one of 168 possible values for...
The design of efficient architectures for Multi-Carrier (MC) communication systems can be a challenging task when it involves the adoption of Filter-Bank Multi-Carrier (FBMC) modulation techniques. The main design issues found in FBMC systems are generated by the incorporation of band-limited shaping pulses. Yet, these pulses have many advantages in terms of performance, such as providing either improved...
This paper presents a low-cost variable-length FFT processor for digital video broadcasting - terrestrial / handheld (DVB-T/H) systems employing pipelined shared-memory architecture, in which a radix-2/23/24 FFT algorithm, multi-path delay commutator (MDC), a novel data scaling approach are exploited. Based on this architecture, novel low cost index block scaling approach was proposed to increase...
VLSI architecture for OFDM baseband transceiver is developed, which is dedicated to cognitive radio systems. To facilitate dynamic spectrum access, this transceiver architecture employs a specialized FFT/IFFT module and a mapping/demapping module. Efficient mechanisms to omit input/ output of unused subcarriers are introduced. Also, calculation of spectrum intensity for subcarrier level carrier sensing...
The design of a highly configurable continuous flow mixed-radix (CFMR) fast Fourier transform (FFT) processor is presented. It computes fixed-point complex FFTs and inverse FFTs (IFFTs), and utilizes a flexible addressing scheme to enable runtime configuration of the FFT length from 16-points to 4096-points. A configurable block floating point (BFP) unit increases numerical performance. Compared to...
We propose a novel distributed cross-layer optimization approach for cognitive radio wireless networks. A cognitive radio is a wireless device that is capable of sensing the prevailing environmental conditions and automatically adapting its operating parameters in order to enhance the performance of both the system and potentially the whole network. Given the lack of a centralized intelligence to...
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