Abstract: A system and method for transmitting high speed data on fixed rate and for variable rate channels. The system and method provides the flexibility of adjusting the data rate, the coding rate, and the nature of individual retransmissions. Further, the system and method supports partial soft combining of retransmitted data with previously transmitted data, supports parity bit selection for successive retransmissions, and supports various combinations of data rate variations, coding rate variations, and partial data transmissions.

Abstract: In methods and apparatus for assessing voice quality in AMPS cellular radio systems, a signal-to-noise ratio is estimated for a SAT signal of an RF channel, and the voice quality of the RF channel is inferred from the SAT signal-to-noise ratio.

Abstract: In methods and apparatus for estimating carrier-to-interference ratios of signals transmitted between cellular radio base stations and mobile units, a SAT signal is transmitted from a base station to a mobile unit served by that base station. The mobile unit receives the SAT signal and retransmits the received SAT signal to the base station. A first order autoregressive parameter is calculated for the received SAT signal at the base station is correlated with a tabulated carrier-to-interference ratio estimate to estimate the carrier-to-interference ratio of the signals.

Abstract: Friction patches 7 are fixed on the metal core 1 of a shutter of a disc valve. The core comprises at least one seating 3 intended to accommodate a friction patch 7 provided with deformable fingers 8 which permit its accurate positioning on the core and its mechanical attachment on the disc via an injection elastomer 2.