Abstract: A data networking system designed to provide efficient, yet reliable, transportation of data across a time division multiplexed network. This invention allows for redundantly sending data segments wherein if bad data segments are received, they can be resent in a dynamic manner depending on the network condition and segments can be fragmented, resized and sent with low overhead due to dynamic header sizes, segment sizes, forward error correction, and cyclic redundancy checks. The result is a very adaptive network that meets the demanding requirements of networks such as power line and wireless while still being able to transport data for voice, audio, video, computer, control, and the like.

Abstract: A network synchronization method designed to provide synchronization of multiple networks and devices. This invention provides a specific method for determining which nodes are responsible for network synchronization as nodes fail or cannot see each other due to conditions on the network. This allows for fault tolerance in a network in which conditions change dynamically. In addition, this invention uses synchronization codes and network numbers to isolate separate networks using the same physical medium, thus allowing sharing of network resources.

Abstract: A method and system for using power and timing estimates to acquire frame acquisition of a reverse CDMA carrier signal. The method includes providing at least one remote transceiver device acquiring a forward CDMA carrier signal, and the one remote transceiver device transmitting a reverse CDMA carrier signal modified to include a frequency associated with the forward CDMA carrier signal. A transceiver base station, in response to determining if the reverse CDMA carrier signal exceeds a reverse CDMA carrier signal threshold (RCCST), uses the frequency embedded in the modified reverse CDMA carrier signal to acquire phase of the reverse CDMA carrier signal. Achieving acquisition the transceiver base station signals a mode change to the remote transceiver. Otherwise, the transceiver base station signals the remote transceiver device to slip the reverse CDMA carrier signal a predetermined number of chips; and/or transmit the reverse CDMA carrier signal at a second power level.

Abstract: A method and system for open-loop acquisition of a pseudo-noise (PN) encoded QPSK burst signal is provided. The method includes the steps of determining a PN correlation accumulation (PNCA) threshold and a sync threshold. Searching for a burst signal synchronization by searching a burst preamble for a sync word exceeding the sync threshold. In response to detecting the sync word, performing a PNCA of at least 256 bits following the detected sync word and comparing the PNCA of the at least 256 bits with the PNCA threshold. The comparison further includes the step of verifying that the PNCA of the 256 bits following the detected sync word exceeds the PNCA threshold and then verifying sync word detection. Next, using the burst preamble an estimate of carrier signal frequency is determined; and using a subsequent burst preamble carrier signal frequency and carrier signal phase is determined.

Abstract: A method and device for frame sync detection using signal combining and correlation. The method comprises the steps of despreading PN coded signals to provide in-phase I1–In, and quadrature phase Q1–Qn signals, wherein each I1–In and each Q1–Qn signal contains at least one sync bit and n?2. The at least one sync bit from each I1–In, and quadrature phase Q1–Qn signals are summed to form sums Is1 and Qs1, respectively. The next step provides a reference sync having at least one bit and compares each sum Is1 and Qs1 with the at least one reference bit. The results of each Is1 and Qs1 comparison are accumulated so as to form two accumulates, IA and QA, respectively. Each accumulate IA and QA, is squared to form IA2 and QA2 from which the sum IA2 and QA2 is formed. The sum IA2+QA2 is compared with a predetermined threshold and as a result of the comparison a determination of whether frame sync has been achieved is made.

Abstract: A method and system for cooperative transmission power control in a communication system is provided. The method, operating within a system having a base station and at least on mobile station, includes the step of providing a power control data structure having memory fields indexed according to a predetermined parameter set. The next step retrieves from one of the memory fields a transmission power control value and adjusts a transmission power level of the mobile station according to the retrieved value.

Abstract: A high speed demodulator system is comprised of an analog to digital converter (ADC); a high speed demultiplexer connected to an input of the ADC; a bank of parallel programmable demodulators connected to an output of the high speed demultiplexer; a timing interface connected to the bank of parallel programmable demodulators; and a phase reference interface connected to the bank of parallel programmable demodulators and a data processor. A parallel programmable demodulator includes a reconfigurable FIR filter, has an input port for receiving digital input signals and an output coupled to a coherent signal processor and a coherent memory. The programmable FIR filter provides filtered signals to the coherent signal processor for storage in the coherent memory. The integrated circuit further includes a sequential weight processor having an input coupled to an output of the coherent memory.

Abstract: A method and system for cooperative transmission power control in a communication system is provided. The method, operating within a system having a base station and at least on mobile station, includes the step of providing a power control data structure having memory fields indexed according to a predetermined parameter set. The next step retrieves from one of the memory fields a transmission power control value and adjusts a transmission power level of the mobile station according to the retrieved value.

Abstract: A method and device for frame sync detection using signal combining and correlation. The method comprises the steps of despreading PN coded signals to provide in-phase I1-In, and quadrature phase Q1-Qn signals, wherein each I1-In and each Q1-Qn signal contains at least one sync bit and n≧2. The at least one sync bit from each I1-In, and quadrature phase Q1-Qn signals are summed to form sums Is1 and Qs1, respectively. The next step provides a reference sync having at least one bit and compares each sum Is1 and Qs1 with the at least one reference bit. The results of each Is1 and Qs1 comparison are accumulated so as to form two accumulates, IA and QA, respectively. Each accumulate IA and QA, is squared to form IA2 and QA2 from which the sum IA2 and QA2 is formed. The sum IA2+QA2 is compared with a predetermined threshold and as a result of the comparison a determination of whether frame sync has been achieved is made.