Abstract: In a code division multiple access wireless communication system having at least one base transceiver station and at least one mobile station having a mobile station receiver assembly configured to receive a coded signal having an information-bearing signal portion and an associated interfering signal portion from the base transceiver station, a method and apparatus for automatic gain control compensation in the mobile station receiver assembly, is disclosed. The method includes causing a gain adjustment to the coded signal by an AGC circuit in the mobile station receiver assembly to produce a post-AGC signal having a post-AGC interfering signal portion with an associated post-AGC interfering signal power level, and an associated gain error value. The method further includes compensating for the gain adjustment to the coded signal if the number of receiver fingers assigned to demodulate the coded signal is less than or equal to a predetermined number.

Abstract: A decoding method and apparatus performs a forward recursion process on recursive convolutionally generated symbols and performs backward recursion on the symbols wherein a next state for the backward recursion process is based on linearly combining both a plurality of bits defining a current state of a backward recursion process and a hypothesized information bit. In one embodiment, a backward state determinator (200) combines all binary bits in a current state backward recursion register (202) to generate a most significant bit (MSB) (210) of a next state backward recursion register (204). To obtain remaining bits of the next state backward recursion register (204), bits (207a-207n) in the current state backward recursion register (202) are shifted. The shifted bits then serve as the least significant bits (208a-208n) in the next state backward recursion register (204).

Abstract: A method and apparatus of determining an encoding rate associated with a received signal (12), where the method including the steps of demodulating in a demodulator (80) to produce a series of metrics (22) representing energies of a series of data symbols carried by received signal (12); decoding in a decoder (20) series of metrics (22) to produce a set of total metrics (TM) (90) corresponding to a set of possible encoding rates; normalizing in a TM normalizer (28) set of TM (90) to produce a corresponding set of normalized TM (23); and determining the encoding rate in a rate determination (24) based on set of normalized TM (23). The normalizing step in TM normalizer (28) includes multiplying a set of effective finger counts (19) by a constant (410) to generate a corresponding set of numbers (420); and subtracting numbers (420) from associating TM (90) to produce normalized TM (23).

Abstract: A block interleaver (212) suitable for communication over fading channels with convolutionally coded signals as input is disclosed. The block interleaver (212) implements multiple interleaving distances which are matched to the particular convolutional code to provide better performance than conventional block interleavers.

Abstract: A method of determining a rate associated with a received signal including the steps of detecting the received signal (40); decoding the received signal at a first rate, determining a first path metric associated with the first rate, decoding the received signal at a second rate, and determining a second path metric associated with the second rate (44); calculating a plurality of discriminant functions based on the first and second path metrics (46); comparing at least one of the plurality of discriminant functions to a first predetermined value (48); and selecting one of the first and second rates as a determined rate based on the comparison.