Abstract: A method and system for optimally combining noisy measurements of attributes to obtain a composite statistically useful attribute result is disclosed. The method includes measuring a signal to noise ratio for each carrier in a pair, computing a signal to noise ratio power which is derived from said signal to noise ratio of each carrier in the pair and adding said signal to noise ratio powers that have been received within a predetermined period of time until the sum of said signal to noise ratio powers reaches a first threshold. The method continues with computing a weight based on the percentage of each measurements signal to noise ratio power in relation to said sum of said signal to noise ratio powers and deriving a statistically useful attribute result based at least in part on said weight of each signal to noise ratio power.

Abstract: A method of adaptively determining a threshold for determining whether an error associated with a frame is an erasure or the result of a discontinuous transmission (DTX) uses a sample set of recently received frames yet avoids undesirable influences on the threshold that otherwise might be caused by the number of erasures in the sample set. A disclosed example uses a histogram-based approach and a simulated sort through the histogram to determine an appropriate threshold value. In a disclosed example the lesser of a bad frame threshold guideline value and a good frame threshold guideline value provide the threshold used to distinguish between a DTX and an erasure.

Abstract: A method and system for optimally combining noisy measurements of attributes to obtain a composite statistically useful attribute result is disclosed. The method includes measuring a signal to noise ratio for each carrier in a pair, computing a signal to noise ratio power which is derived from said signal to noise ratio of each carrier in the pair and adding said signal to noise ratio powers that have been received within a predetermined period of time until the sum of said signal to noise ratio powers reaches a first threshold. The method continues with computing a weight based on the percentage of each measurements signal to noise ratio power in relation to said sum of said signal to noise ratio powers and deriving a statistically useful attribute result based at least in part on said weight of the of each signal to noise ratio power.

Abstract: A DTX detection method evaluates soft symbols from a decoding process to evaluate whether a checksum error is caused by an erasure condition or a DTX condition. The inventive method divides the soft symbols or a function of the soft symbols by a normalizing factor that greatly reduces the effect of the overall magnitude of the channel estimates that are used to calculate the soft symbols, restoring a value proportional to the received symbol energy. The method then evaluates this value, rather than the unnormalized value, to determine whether a checksum error for the frame is caused by a DTX condition or an erasure condition. Normalizing the soft symbols to obtain a metric proportional to the actual symbol energy greatly reduces the effect of the overall channel level on DTX detection, making it easier to distinguish between DTX cases and erasure cases.

Abstract: A method and apparatus are provided for use in a transceiver of a wireless system that enable analog mode operations to be performed using in-phase (I) and quadrature (Q) values. When operating in the analog mode, the apparatus comprises a processor that receives digital I, Q pairs relating to audio or data signals and performs FM demodulation to generate information content relating to the audio or data signals. When receiving data in the analog mode, the data is in a particular format.

Abstract: Method for automatically determining whether a communication trunk is operating properly without having to take the trunk out of service and without the need of a craftsperson to initiate the testing of the communication trunk. The communication trunk is tested for continuity and integrity on a periodic or aperiodic basis.

Abstract: A method and apparatus are provided for use in a transceiver of a wireless system that enable analog mode operations to be performed using in-phase (I) and quadrature (Q) values. The apparatus comprises a processor that performs FM modulation to generate I, Q pairs when operating in the analog mode. When transmitting in the analog mode, the processor encodes a digital representation of the signal to be transmitted into I, Q pairs and outputs the I, Q pairs to a digital-to-analog converter (DAC) comprised by the apparatus. The DAC converts the digital I, Q pairs into analog signals and outputs the analog signals to a cosine wave generator, which generates an in-phase cosine wave and an out-of-phase cosine wave having amplitudes that are proportional to the I and Q values, respectively. The cosine waves are summed for transmission over air. When receiving in the analog mode, a digital down converter converts the received signal into digital I and Q values.