Channel characteristics estimation system, channel...

Details Channel characteristics estimation system, channel... Channel characteristics estimation system, channel...

2004-08-03

2009-11-24

Ghayour, Mohammad H (Department: 2611)

Pulse or digital communications

Spread spectrum

Frequency hopping

C375S133000, C375S135000, C375S136000, C370S320000

Reexamination Certificate

active

07623561

ABSTRACT:
Channel characteristics need to be estimated in a wireless communication system which performs frequency hopping. A transmission side aligns phase values of carriers of frequencies used for hopping to known values at a transmission start time and transmits a transmission signal for each hopping obtained by converting frequencies. A reception side aligns phase values of carriers of frequencies used for each hopping at a reception start time and performs frequency conversion for respective reception signals. A phase rotation component contained in the reception signal for each hopping is common to all hoppings. Consequently, the phase rotation component can be included in channel characteristics to be measured for estimation.

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Hamaguchi et al (hereinafter Hamaguchi), “Time-Frequency Spread OFDM/FHMA”, Communications Research Laboratory, Dept. of ECS, University of Southampton, IEEE 2003.

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