Abstract: A method for the selection of forward error correction (FEC)/constellation pairings (800) for digital transmitted segments based on learning radio link adaptation (RLA) including formatting a packet transmission having a predetermined number of information bits (801). The packet is then split into a plurality of segments (803) where an RLA is used (805) to determine the optimum format of the packet. The plurality of segments is then sent to a channel encoder for FEC encoding and symbol mapping (807) at a rate selected by the RLA. The segments are then formatted into packet blocks (809) and transmitted in blocks that form a time slot at a constant symbol rate.

Abstract: In a wireless communication system with an air interface comprising a plurality of bursts, a plurality of bursts is defined. Each burst comprises a field (300) embedded within the burst. The field is one of a synchronization field (300?) and a signaling field (300?). When the field is a synchronization field, a position of at least one subsequent burst comprising the signaling field is defined, and a position of at least one subsequent burst comprising the synchronization field is defined.

Abstract: A method for maximizing intermodulation interference protection during a handoff between radio cell sites (300) includes scanning a plurality of radio channels (302) and measuring the signal power (307, 315) for at least one of the radio channels. One or more receiver attenuators (313) are then set based on the detection of intermodulation (IM) interference of the measured channel. The attenuators are then scaled (311) based on the degree of IM interference. If the attenuators cannot mitigate this interference below some predetermined level, the radio channel is changed (321) and the process begins again to ensure a high quality of communication with a cell site.

Abstract: A received synchronization pattern is compared against first and second known synchronization patterns. If the received pattern is of the first known pattern, the payload is processed as voice; and if the received pattern is of the second known pattern, the payload is processed as non-voice. In an alternative, the received pattern is compared against first and second known synchronization patterns. If the received pattern is of the first known pattern, a first operating mode is selected, and if the received pattern is of the second known pattern, a second operating mode is selected.

Abstract: In an outbound transmission (300), an address of a first subscriber unit assigned to transmit in a first inbound slot is identified. With one bit in the outbound transmission (300), an additional inbound slot the first subscriber unit is assigned to transmit is identified.

Abstract: Disclosed are methods for adjustment values. In one embodiment, a cumulative adjustment value is provided in memory, an inbound signal is transmitted to a base station during a random access opportunity, and a relative adjustment value is received from the base station. Then, the relative adjustment value is summed with the cumulative adjustment value to create a new cumulative adjustment value which is stored in the memory. Finally, a subsequent inbound signal is transmitted using the new cumulative adjustment value during a reserved access opportunity.

Abstract: A multi-carrier modulation communications system and method (100) for providing channel estimation that uses a transmitter for inserting pilot symbols in a digital multi-carrier modulated radio frequency (RF) signal and a receiver for receiving the pilot symbols in multi-carrier modulation RF signal. In order to provide channel estimation the receiver detects (101) channel power gains from a plurality of designated pilot symbols and calculates (103) both a speed parameter (S) and a multi-path parameter (M) for the channel receiving the pilot symbols. A channel model is then defined (105) based upon the speed parameter and multi-path parameter value and a predefined set of pilot coefficients is chosen (107) that substantially matches the channel model. The resulting set of pilot coefficients is then utilized (109) for optimizing pilot symbol interpolation.

Abstract: In a system having at least a first slot (104) and a first header (106), at least one field is provided in the first header (106). The first slot (104) is configured into at least a first segment and a second segment or into at least a signaling communications path comprising a plurality of messages, based on a value associated with at least a portion of the at last one field associated with the first header. The first segment/message is address to a first subscriber unit and the second segment/message is addressed to a second subscriber unit.

Abstract: In a wireless communication system with an air interface comprising a plurality of bursts, a plurality of bursts is defined. Each burst comprises a field (300) embedded within the burst. The field is one of a synchronization field (300′) and a signaling field (300″). When the field is a synchronization field, a position of at least one subsequent burst comprising the signaling field is defined, and a position of at least one subsequent burst comprising the synchronization field is defined.

Abstract: A received synchronization pattern (300″) is compared against first and second known synchronization patterns. If the received pattern is substantially similar to the first known pattern, the payload is processed as voice; and if the received pattern is substantially similar to the second known pattern, the payload is processed as non-voice. Alternatively, a target synchronization pattern dependent on an operating mode is selected. The received pattern is compared against the target pattern. If the received pattern is substantially similar to the target pattern, the payload is processed; otherwise, the burst is discarded. In yet another alternative, the received pattern is compared against first and second known synchronization patterns having a common length. If the received pattern is substantially similar to the first known pattern, a first operating mode is selected, and if the received pattern is substantially similar to the second known pattern, a second operating mode is selected.

Abstract: In a digital voice communication system, a transmitting radio (100/102) checks for activity on a channel. If activity is not detected on the channel, the transmitting radio transmits at least one voice frame on the channel. If activity is detected on the channel, the transmitting radio temporarily buffers the at least one voice frame and waits a period of time prior to re-checking the channel for activity. If activity is still detected on the channel, the transmitting radio repeats the step of waiting until activity is no longer detected on the channel; otherwise, the transmitting radio transmits the at least one voice frame that was temporarily buffered.

Abstract: A subscriber (100) provides a cumulative adjustment value in memory. Upon transmission of the inbound signal to a base station (102), the subscriber receives a relative adjustment value. The base station calculates the relative adjustment value based on receipt of the inbound signal against a time window. The subscriber sums the adjustment value with the cumulative adjustment value to create a new cumulative adjustment value. The subscriber stores the new cumulative adjustment value in memory, and a subsequent inbound signal is transmitted using the new cumulative adjustment value. Alternatively, the subscriber obtains a priori information as to when a base station transmits a burst. Upon receipt of the burst, the subscriber calculates a time delay between when the burst was transmitted and when the burst was received. The subscriber stores the time delay, and advances the transmission timing by the time delay.

Abstract: In a system having at least a first slot (104) and a first header (106), at least one field is provided in the first header (106). The first slot (104) is configured into at least a first segment and a second segment or into at least a signaling communications path comprising a plurality of messages, based on a value associated with at least a portion of the at last one field associated with the first header. The first segment/message is address to a first subscriber unit and the second segment/message is addressed to a second subscriber unit.

Abstract: In an outbound transmission (300), an address of a first subscriber unit assigned to transmit in a first inbound slot is identified. With one bit in the outbound transmission (300), an additional inbound slot the first subscriber unit is assigned to transmit is identified.

Abstract: An improved squelch system (10) is provided in accordance with the present invention. The system includes a high-deviation subsystem (20) to detect a carrier with modulation, and a low-deviation subsystem (30) to detect the carrier with minimal modulation. If either the high-deviation system (20) or the low-deviation system (30) indicate a signal of sufficient strength, an output for the squelch system is set to un-mute, otherwise the output (70) is set to mute.