US 6,983,243 B1
Methods and apparatus for wireless transmission using multiple description coding
Vivek K. Goyal, Hoboken, N.J. (US); Jelena Kovacevic, New York, N.Y. (US); and Francois Masson, Monthey (Switzerland)
Assigned to Lucent Technologies Inc., Murray Hill, N.J. (US)
Filed on Oct. 27, 2000, as Appl. No. 9/698,437.
Int. Cl. G10L 19/22 (2006.01); H04B 1/69 (2006.01); H04B 7/02 (2006.01)
U.S. Cl. 704—222 20 Claims
OG exemplary drawing
 
1. A method of processing a signal for transmission in a wireless communication system, the method comprising the steps of:
encoding the signal in a multiple description coder which generates a plurality of different descriptions of a given portion of the signal;
arranging the different descriptions of the given portion of the signal into packets such that at least a first description of the given portion is placed in a first packet and a second description of the given portion is placed in a second packet; and
transmitting each of the packets using a frequency hopping modulator, wherein a hopping rate of the modulator is configured based at least in part on a number of descriptions generated for each of a plurality of different portions of the signal;
wherein the hopping rate of the frequency hopping modulator is selected such that a transmission delay of the system is not increased as a result of the transmission of the plurality of descriptions relative to a transmission delay of the system for single description transmission.