Abstract: A method performed in a wireless communication system having radio frequency burst transmission interference is presented. The method includes obtaining a first power level of noise and interference signals in an environment of at least one of a plurality of wireless communication devices serviced by an access point; and estimating a second power level by filtering the first power level.

Abstract: This description relates to information sharing in a private access point network.

Abstract: In a wireless MIMO communication system for N symbols of a frame of information, allocating N1 symbols to a stronger eigen sub-channel and N2 symbols to a weaker eigen sub-channel, where N1>N2; determining a probability of reception error when transmitting the N2 symbols through the weaker eigen sub-channel for an auxiliary signal-to-noise ratio; solving for a quality of service QoS of the weaker eigen sub-channel and if the QoS is less than a desired QoS, decreasing the value of N and repeating allocating symbols, determining the probability of reception error and solving for the QoS. Another aspect includes asymmetrically allocating spreading codes to a stronger eigen sub-channel and to a weaker eigen sub-channel such that the stronger eigen sub-channel is allocated more spreading codes than the weaker eigen sub-channel; and transmitting all systematic bits of turbo coded information over the stronger eigen sub-channel.

Abstract: Communication is initiated with a radio access network through a first private access point according to a first air interface standard based on a first identifier corresponding to the first private access point. A second identifier corresponding to the first private access point is determined by using a roaming list. The second identifier is associated with the first identifier in the roaming list. A set of one or more carrier frequencies for communication according to a second air interface standard is determined using the roaming list. The second identifier is mapped to the set of one or more carrier frequencies in the roaming list. Based on the roaming list, initiation of communication with the radio access network is attempted through the first private access point according to the second air interface standard based on the second identifier at one carrier frequency of the set of one or more carrier frequencies.

Abstract: Among other things, a method performed by a first access point is described. The method includes outputting signals. At least some of the signals interfere with communication between a device and a second access point. The method also includes determining whether to output the signals in a predefined mode based on dynamically calculated values of a parameter. The parameter is related to signal interference at the device. If it is determined to output the signals in the predefined mode, for a time period, the first access point outputs signals in the predefined mode.

Abstract: Techniques for reducing beacon interference include identifying a mobile device located within a coverage area serviced by a first access point, determining a power of a signal transmitted by a mobile device to a second access point; and modifying the beacon to reduce interference.

Abstract: Techniques for reducing beacon interference include identifying a mobile device located within a coverage area serviced by a first access point, determining a power of a signal transmitted by a mobile device to a second access point; and modifying the beacon to reduce interference.

Abstract: In general, a first private access point detects a neighboring private access point. An address of the neighboring private access point is identified, and a peer-to-peer network that includes the first private access point and the neighboring private access points is formed. The peer-to-peer network is maintained between the first private access point and the neighboring private access points.

Abstract: A method performed in a wireless communication system having radio frequency burst transmission interference is presented. The method includes obtaining a first power level of noise and interference signals in an environment of at least one of a plurality of wireless communication devices serviced by an access point; and estimating a second power level by filtering the first power level.

Abstract: A method performed in a wireless communication system having radio frequency burst transmission interference is presented. The method includes obtaining a first power level of noise and interference signals in an environment of at least one of a plurality of wireless communication devices serviced by an access point; and estimating a second power level by filtering the first power level.

Abstract: This description relates to information sharing in a private access point network.

Abstract: A method for transmitting a packet of N input bits includes encoding all of the N bits as a single entity, such as with an interleaver of length N within a turbo coder, outputting M encoded bits, channel interleaving the M bits, splitting the M encoded bits into a parallel first and second portion, and transmitting them over separate channels to achieve spatial diversity. The size of the first and second portion is determined based on a closed feedback loop that provides some knowledge of the channel, preferably a measure of channel capacity. The feedback loop may also provide channel knowledge to a subpacket selector associated with each transmit antenna, which determines an appropriate rate for that channel and selects subpackets to fill a transmission packet for that channel. The subpacket selectors choose a subpacket of systematic bits and fill the remaining transmission packet size with subpackets of parity bits.

Abstract: This description relates to access terminal hand-off methods in wireless networks.

Abstract: A wireless communication system including receiving and base stations. The receiving station includes a detector that measures a downlink channel correlation matrix for multiple antennas of a base station. The detector computes an antenna weight increment vector normal to an antenna weight vector for multiple beams from the multiple antennas of the base station. The detector quantizes the antenna weight increment vectors to produce a respective quantized antenna weight increment vector. The receiving station includes a transmitter that sends the quantized antenna weight increment vectors to the base station. The base station includes a beamformer selector that receives from the receiving station and re-orthogonalizes the quantized antenna weight increment vector for each of the multiple beams.

Abstract: This patent application relates to private access point beacon signals in wireless networks.

Abstract: In a wireless MIMO communication system for N symbols of a frame of information, allocating N1 symbols to a stronger eigen sub-channel and N2 symbols to a weaker eigen sub-channel, where N1>N2; determining a probability of reception error when transmitting the N2 symbols through the weaker eigen sub-channel for an auxiliary signal-to-noise ratio; solving for a quality of service QoS of the weaker eigen sub-channel and if the QoS is less than a desired QoS, decreasing the value of N and repeating allocating symbols, determining the probability of reception error and solving for the QoS. Another aspect includes asymmetrically allocating spreading codes to a stronger eigen sub-channel and to a weaker eigen sub-channel such that the stronger eigen sub-channel is allocated more spreading codes than the weaker eigen sub-channel; and transmitting all systematic bits of turbo coded information over the stronger eigen sub-channel.

Abstract: In a JE, spread spectrum communication MIMO system where a demultiplexed packet is transmitted over multiple streams, two versions of a single CQI are disclosed: generalized SNR or constrained mutual information CMI between the transmitted and received chip vectors. In the receiver, the CMI is constrained so that filtering is suboptimal. The filter bank is preferably LMMSE or MVDR filters that convert the multi-path channel into a single path channel so that joint sequence detection is unnecessary. Detection is by a per-Walsh code architecture, wherein a plurality of Walsh-code specific detectors in parallel detect bits or symbols from the single-channel chips after downconverting chip to symbols. Link to system mapping is realizable using the disclosed CQI for a JE MIMO system in that the CQI or related information is returned to the transmitter, which adapts coding rate and/or modulation for the channel as represented by the CQI.

Abstract: In a wireless MIMO communication system, for N symbols of a frame of information, allocating N1 symbols to a stronger eigen sub-channel and N2 symbols to a weaker eigen sub-channel, where N1>N2; determining a probability of reception error when transmitting the N2 symbols through the weaker eigen sub-channel for an auxiliary signal-to-noise ratio; solving for a quality of service QoS of the weaker eigen sub-channel and if the QoS is less than a desired QoS, decreasing the value of N and repeating allocating symbols, determining the probability of reception error and solving for the QoS. Another aspect includes asymmetrically allocating spreading codes to a stronger eigen sub-channel and to a weaker eigen sub-channel such that the stronger eigen sub-channel is allocated more spreading codes than the weaker eigen sub-channel; and transmitting all systematic bits of turbo coded information over the stronger eigen sub-channel.

Abstract: Disclosed is a minimum mean square error (MMSE) equalizer and method for single-user detection of a signal received from a downlink code-division multiple access CDMA channel. The equalizer includes a Kalman filter having an input coupled to the received signal for generating a best linear unbiased estimate of a transmitted chip sequence for a single user. A reduced computational complexity Kalman filter embodiment is also disclosed that only periodically updates a Kalman filter prediction error covariance matrix P(k|k?1), a Kalman filter filtering error covariance matrix P(k|k) and the Kalman gain K(k).

Abstract: In addition to other aspects disclosed, a portable base station requests a mobile handset to measure signal strengths associated with a portion of a code space. The portable base station also sends a message that represents the signal strength measurements to a remotely located control station.