Abstract:
The present invention addresses the need for a device and method of frame reconstruction among soft handoff legs that improves the reliability of received information without reducing RF capacity. Given received frames from each leg of a soft handoff (300-303) a reconstructed frame (304) is produced. Subframes (e.g., 362) with passing inner frame quality indicators (352) are selected for the reconstructed frame. For portions of the reconstructed frame (e.g., 324 and 344) that do not have corresponding portions in the leg frames with passing inner frame quality indicators, a bit-wise majority rule is applied to select values.
Abstract:
A receiver (156) includes both a coherent and noncoherent demodulator. When the confidence that estimates of the channel is high, the coherent demodulator is implemented. When the confidence that estimates of the channel is low, the noncoherent demodulator is implemented. A controlling microprocessor (162) controls the selection process and also provides a signal (158) to enable the noncoherent demodulator in instances when noncoherent demodulation would most likely be better than coherent demodulation. As an example, such an instance would be immediately after handoff of a mobile station (505) from a source base-station (503) to a target base-station (502).
Abstract:
A typical radio frame (300) comprises A, B, and C vocoded bits (304). At the end of each frame (300) A and B bits (305) are inserted from a previous frame. Thus, each frame not only comprises A, B, and C bits (304) for that frame, but also comprises those A and B bits (305) originally transmitted in a prior frame. Thus, each frame comprises high and low priority vocoded bits (304) from the current vocoder frame, and those higher priority bits from a preceding frame (305). By placing an inner CRC (302, 303) around the most important bits of the vocoded frame, even though a frame is erased (e.g. its outer CRC (301) failed) it can still be verified that the most important bits in the vocoded frame are correct. Since the class B and C bits can tolerate some errors, the vocoded frame can then play out if its inner CRC passes.
Abstract:
A receiver (156) includes both a coherent and noncoherent demodulator. When the confidence that estimates of the channel is high, the coherent demodulator is implemented. When the confidence that estimates of the channel is low, the noncoherent demodulator is implemented. A controlling microprocessor (162) controls the selection process and also provides a signal (158) to enable the noncoherent demodulator in instances when noncoherent demodulation would most likely be better than coherent demodulation. As an example, such an instance would be immediately after handoff of a mobile station (505) from a source base-station (503) to a target base-station (502).
Abstract:
A wireless communication infrastructure entity (200) having a communication configuration is configured to generate parity bits based on an information word and to encode the parity bits based on the communication configuration of the wireless communication infrastructure entity, wherein the encoded parity bits are combined with the information word. A wireless communication user terminal is configured to identify a set of configuration indicator bits used to encode parity bits combined with an information word and to determine a communication configuration of the wireless communication entity from which the combination of the information word and the encoded parity bits were received based on the set of configuration indicator bits used to encode the parity bits.
Abstract:
To address the need to convey ACK/NACK information in a manner that conserves system and signaling resources, embodiments of the present invention employ a Node-B transmitting on two types of ACK/NACK broadcast channels (501, 502), one type for received uplink data that was scheduled by the Node B and the other type of broadcast channel for received uplink data that was not scheduled by the Node B. Other embodiments of the invention employ a Node-B transmitting on two types of broadcast channels, one type of broadcast channel for received uplink data that comes from non-SHO users and another type of broadcast channel for received uplink data that comes from non-scheduled users or comes from scheduled SHO users. In addition, ACK/NACK information is scheduled (800) into the available broadcast channel time slots in accordance with a transmission priority that is determined by a scheduler.
Abstract:
A receiver includes both a coherent and noncoherent demodulator (222). When the confidence that estimates of the channel is high, the coherent demodulat or (408, 409, 425, 412) is implemented (400, 418). When the confidence that estimates of the channel is low, the noncoherent demodulator (422, 421) is implemented. A controlling microprocessor controls the selection process and also provides a signal to enable the noncoherent demodulator in instances wh en noncoherent demodulation would most likely be better than coherent demodulation. As an example, such an instance would be immediately after handoff of a mobile station from a source base-station to a target base- station.
Abstract:
A receiver includes both a coherent and noncoherent demodulator (222). When the confidence that estimates of the channel is high, the coherent demodulator (408, 409, 425, 412) is implemented (400, 418). When the confidence that estimates of the channel is low, the noncoherent demodulator (422, 421) is implemented. A controlling microprocessor controls the selection process and also provides a signal to enable the noncoherent demodulator in instances when noncoherent demodulation would most likely be better than coherent demodulation. As an example, such an instance would be immediately after handoff of a mobile station from a source base-station to a target basestation.
Abstract:
A method (1700) and apparatus (1801) provide channel estimation with extended bandwidth filters. Antenna (1813) receives a signal such as a pilot signal and detects a bandwidth associated with the pilot signal in a detector (320). One of a plurality of filters (603, 605, 607, and 609) including extended bandwidth filters (311) and a default filter (305) can be selected by a selector (617). If the detector detects activity associated with a wider bandwidth, the filter associated with the wider bandwidth is selected over the presently selected filter. If no activity is detected, the default filter is selected.