Method and apparatus for transmitting signals in a multi-tone co

Details Method and apparatus for transmitting signals in a multi-tone co Method and apparatus for transmitting signals in a multi-tone co

1993-11-09

1995-04-25

Marcelo, Melvin

Multiplex communications

Wide area network

Packet switching

370 691, 375205, 379 59, 455 331, 455 541, H04J 100, H04J 1300, H04B 7216

Patent

active

054105382

ABSTRACT:
A method of transmitting signals from a mobile unit to a base station in the reverse link direction using multi-tone techniques includes the step of dividing a frequency band into a plurality of generally even spaced tones. The tones are partitioned into a predetermined number of tone sets which each contain a predetermined number of tones. Each unit within a given sector is assigned a tone set for transmitting information signals. The tones within each tone set are selected so that the modulated signals transmitted by each unit are orthogonal with respect to all other tone sets assigned to units in that sector. Adjacent cells have no more than one tone in common.

REFERENCES:
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patent: 5267261 (1993-11-01), Blakeney, II et al.
patent: 5295153 (1994-03-01), Gudmundson
patent: 5307341 (1994-04-01), Yates et al.
U. Timor, "Multi-Tone Frequency-Hopped MFSK System for Mobile Radio", Bell System Technical Journal, vol. 61, No. 10, pp. 3007-3017, Dec. 1982.
L. J. Cimini, Jr., "Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing", IEEE Transactions on Cummunications, vol. COM-33, No. 7, Jul. 1985.
N. Livneh, R. Meidan, M. Ritz, G. Silbershatz, "Frequency Hopping CDMA for Cellular Radio", Proceedings of the International Commsphere Symposium, Herzliya, Israel, Dec. 1991.

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