Abstract: In a variable rate wireless communication system, an explicit reduced-bit rate indicator is used to communicate the data rate and configuration of the transmission to the receiver. Data throughput is increased by reducing the number of bits required to indicate data rate and channel configuration. Related allocation of total transmit power, and related receive processing are conserved. Reception is enhanced by increased probability of correct decoding. Receiver performance is enhanced by reducing the probability of false erasures and associated outerloop setpoint adjustment errors when the receiver is notified of channels with zero data rates. Power consumption is reduced by using fewer bits to communicate data rate and channel configuration information, and by more accurate setpoint adjustment.

Abstract: In a CDMA data communication system capable of variable rate transmission, utilization of beam switching techniques decreases the average interference caused by transmissions of a base station to subscriber stations within a cell, and in neighboring cells. Base stations utilize multiple transmit antennas, each transmitting signals at controlled amplitudes and phases, to form transmit signal corresponding to sector divisions. Data and reference signals are transmitted along sector division beams that alternate according to fixed time slots in order to increase system capacity and data rates by maximizing carrier-to-interference ratios (C/I) measured at subscriber stations.

Abstract: A method and apparatus for estimating channel conditions in a code-division multiple access (CDMA) communication system having a pilot signal and a traffic signal. The apparatus includes a pilot filter for generating channel estimates from the pilot signal and a circuit for reconstructing the traffic information bits after they have been decoded. A predictive channel estimation circuit generates predictive channel estimates from the original traffic signal demodulated by the reconstructed traffic information bits. A demodulator demodulates the traffic signal using the predictive channel estimates and the pilot signal channel estimates. By using the predictive channel estimates that contain signal energy from the traffic signal as a coherent reference, the channel conditions may be estimated more accurately than by using the pilot signal alone.

Abstract: A forward link power control mechanism measures the reverse link power control bits which are transmitted on the forward traffic channel. At the remote station, the reverse link power control bits from multiples base stations or multiple signal paths are measured, combined, and filtered to yield an improved measurement of the forward link signal quality. The reverse link power control bits which are deemed unreliable are omitted from use in the power control loop. The remote station generates a set of forward link power control bit in accordance with the measurements and transmits these bits to all base stations in communication with the remote station. Each base station adjusts its gain of the forward traffic channel in accordance to its measurement of the forward link power control bit. However, the gains of the forward traffic channels of the base stations are corrected periodically so that erroneous reception of the forward link power control bits by the base stations do not accumulate.

Abstract: A short Personal Identification Number (PIN) is used to transfer a subscription for wireless service to a new wireless terminal 104, thereby providing enhanced personal mobility to the subscriber. The transfer is rendered secure by the exchange of Diffie-Hellnan Encrypted Key Exchange (DH-EKE) messages 110, 114.

Abstract: A system and method for reducing the interference experienced by sensitive electronic devices, such as hearing aids, operative in the vicinity of CDMA user communication devices. A transmitter of the communications device is configured to transmit signal power substantially continuously at a full rate power level irrespective of the variable data rate at which the transmitter would otherwise be operative. In a first embodiment, a variable rate vocoder within the transmitter is directed to perform full-rate vocoding, irrespective of an instantaneous level of user speech. In a second embodiment, a microprocessor builds full-rate frames using repeated versions of code symbols generated by the vocoder. In a third embodiment, the microprocessor builds full rate frames by generating signaling bits of a predetermined pattern to pad otherwise non-full frames.

Abstract: A short Personal Identification Number (PIN) is used to transfer a subscription for wireless service to a new wireless terminal 104, thereby providing enhanced personal mobility to the subscriber. The transfer is rendered secure by the exchange of Diffie-Hellman Encrypted Key Exchange (DH-EKE) messages 110, 114.