Timing and frequency acquisition for mediaflo systems

Details Timing and frequency acquisition for mediaflo systems Timing and frequency acquisition for mediaflo systems

2008-04-04

2010-10-26

Ferris, Derrick W (Department: 2463)

Multiplex communications

Generalized orthogonal or special mathematical techniques

Fourier transform

Reexamination Certificate

active

07821916

ABSTRACT:
An apparatus, logic, and method of performing timing and frequency estimation in a MediaFLO™ mobile multimedia multicast system comprising a receiver and a transmitter, wherein the method comprises receiving a wireless data stream comprising a MediaFLO™ mobile multimedia multicast system superframe comprising Orthogonal Frequency Division Multiplexing (OFDM) symbols; estimating a Fast Fourier Transform (FFT) trigger point for each of the received OFDM symbols; estimating a fine carrier frequency offset of each OFDM symbol; determining the start of the MediaFLO™ mobile multimedia multicast system superframe by locating a Time Division Multiplexed (TDM) pilot symbol in the superframe; estimating a coarse carrier frequency offset of each of the received OFDM symbols; and synchronizing the receiver to the start of the MediaFLO™ mobile multimedia multicast system superframe and the transmitted OFDM symbols based on the fine carrier frequency offset, the TDM pilot symbol, and the coarse carrier frequency offset.

REFERENCES:
patent: 2006/0215778 (2006-09-01), Murthy et al.

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