Abstract: A method and apparatus for efficient encoding of linear block codes uses a lookup table including a set of impulse responses to support faster performance by encoding in parallel. Advantages include a scalability that is lacking in existing schemes.
Type:
Grant
Filed:
September 26, 2000
Date of Patent:
July 13, 2004
Assignee:
Qualcomm Incorporated
Inventors:
James Y. Hurt, Jeffrey A. Levin, Nikolai Schlegel
Abstract: A method and an apparatus for rate control in a high data rate (HDR) communication system are disclosed. An exemplary HDR communication system defines a set of data rates, at which an access point (AP) may send data packets to an access terminal (AT). The data rate is selected to maintain targeted packet error rate (PER). The AT's open loop algorithm measures received signal to interference and noise ratio (SINR) at regular intervals, and uses the information to predict an average SINR over the next packet duration. The AT's closed loop algorithm measures a packet error rate (PER) of the received signal, and uses the PER to calculate a closed loop correction factor. The loop correction factor is added to the SINR value predicted by the open loop, resulting in an adjusted SINR. The AT maintains a look up table, which comprises a set of SINR thresholds that represent a minimum SINR necessary to successfully decode a packet at each data rate.
Type:
Grant
Filed:
April 24, 2000
Date of Patent:
June 15, 2004
Assignee:
Qualcomm Incorporated
Inventors:
Nagabhushana T. Sindhushayana, Rashid A. Attar, Eduardo A. S. Esteves
Abstract: A method and apparatus for selecting a favored transmission slot for communicating non-voice data in conjunction with a voice-data communication. The slot, reflecting a favored power level and transmission rate for transmitting the non-voice data on a supplemental channel, is selected based upon the transmission power levels for voice-data transmitted by a base station to a remote station on a fundamental channel. The favored transmission slot is selected without the remote station messaging information to the base station concerning frequency channel or interference information for the supplemental channel.