Method and device for frame detection and synchronizer

Details Method and device for frame detection and synchronizer Method and device for frame detection and synchronizer

2003-07-16

2009-10-20

Ghayour, Mohammad H (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S354000

Reexamination Certificate

active

07606333

ABSTRACT:
The IEEE 802.11a standard uses OFDM, where the transmission is divided into several orthogonal sub-carriers. Here, an algorithm is used for the frame detection; a simplified differentiator obtains an absolute maximum in the differentiated signal at that point where the first plateau in JF(k) starts; a peak detector obtains the position of the absolute maximum in the differentiated signal, divides the problem into relative peak detection and falling edge detection; a simplified XNOR-based crosscorrelator is used, where the simplifications are based on the knowledge of the reference; a particular solution is provided for the CORDIC algorithm in the vectoring mode for arctangent calculation; hardware structuring is presented for the whole synchronizer so as to obtain a simple control mechanism and the separation of this structure into different clock domains, each one being activated only to perform its operation and deactivated afterwards.

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