Training sequence in digital cellular radio telephone system

Details Training sequence in digital cellular radio telephone system Training sequence in digital cellular radio telephone system

1994-02-24

1995-12-26

Coles, Sr., Edward L.

Pulse or digital communications

Equalizers

Automatic

370 82, H03H 730, H03K 5159

Patent

active

054794447

ABSTRACT:
In radio phone systems with a digital cellular design currently used a training sequence of constant length, consisting of an guard part and a reference part, is included in a transmission burst between a base station and a mobile station. With the aid of a received training sequence, the receiver calculates the impulse response of the channel and is thereafter adapted into the channel. The quality of the connection can, according to the invention, be enhanced in that the training sequence is made adaptive, whereby the lengths of the guard part and the reference part may vary while the total length of the training sequence remains the same. According to another embodiment, also the total length of the training sequence is changed.

REFERENCES:
patent: 4672630 (1987-06-01), Kaku
patent: 5212689 (1993-05-01), Eriksson
patent: 5303226 (1994-04-01), Okanoue et al.
IEEE Transactions on Vehicular Technology, vol. 40, No. 2, May 1991, New York, U.S., pp. 392-402, "Fast Adaptive Equalizers For Narrow-Band TDMA Mobile Radio" D'Aria et al.
Proceedings of 41st IEEE Vehicular Technology Conference, May 1991, St. Louis, U.S., "Adaptive Equalizer For Digital Cellular Radio" Nakai et al.
Finnish Office Action dated 15 Nov. 1993 and English Translation thereof.

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