Pulse or digital communications – Systems using alternating or pulsating current – Plural channels for transmission of a single pulse train
Patent
1996-04-10
1999-09-28
Pham, Chi H.
Pulse or digital communications
Systems using alternating or pulsating current
Plural channels for transmission of a single pulse train
375299, 375347, 455101, 455506, H04B 702, H04L 102
Patent
active
059600390
ABSTRACT:
An adaptive high speed data transmission system is described. In one aspect, the transmitter for this system employs a plurality of transmit antennas which have controllable offsets. The transmitter also includes signal coding circuitry suitable for use to address transmission impairments due to fast fading in the transmission channel. At the receiver, the received signal is analyzed to determine the fading characteristics of the channel. Where slow fading is detected, the offsets are employed to convert the slow fading into fast fading. The channel characteristics are continually resampled and these characteristics are used to adjust the transmitter and the receiver to achieve optimal transmission speed.
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Winters, Jack H., Salz, Jack, Gitlin, Richard D., "The Impact of Antenna Diversity on the Capacity of Wireless Communication Systems," IEEE Transactions on Communications, vol. 42, No. 2/3/4, pp. 1740-1751, Feb./Mar./Apr. 1994.
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Martin Carol Catalano
Winters Jack Harriman
Lucent Technologies - Inc.
Pham Chi H.
Webster Bryan
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