Abstract: A digital simultaneous voice and data (DSVD) system includes a communication random access memory (COMMRAM) driver and interface for dynamically remapping COMMRAM memory contents. The communication RAM is portable to selected hardware including direct memory address (DMA) based communications equipment and is connected between a digital signal processor (DSP) and a control processor (CP).

Abstract: Method and system for simulating multiple concurrent clients on a network server to stress test the server. Each of one or more processors has one executable software thread, the send data thread, whereby I/O requests are initiated on behalf of all simulated clients. Each of the one or more processors has another executable software thread, the receive data thread, whereby I/O response data is received from the server on behalf of all simulated clients. A software object, such as a completion port, that is capable of detecting completion of an executable event allows the stress test to function using only two executable threads per processor. The efficiency of the server can be measured as the send data thread initiates I/O requests and as the server responds thereto. The stress test is flexible in that the number of simulated clients and the I/O requests initiated can vary widely. Moreover, many different types of network servers can be tested.

Abstract: In an orthogonal frequency division multiplexing (OFDM) system which uses an outer Reed-Solomon encoder and interleaver an inner convolutional encoder, after the inner convolutional encoding the data bits are interleaved, and then grouped into symbols, each symbol having “m” bits. After grouping, the symbols are mapped to a complex plane using quadrature amplitude modulation (QAM). Thus, bits, not symbols, are interleaved by the inner interleaver. A receiver performs a soft decision regarding the value of each bit in each complex QAM symbol received.

Abstract: A selection diversity system and method for use in a TDMA (time division multiple access) radio system, particularly suited for DECT (Digital Enhanced Cordless Telephone) or PWT (personal wireless telephony) applications. A digitized version of a received signal is buffered long enough to allow selection diversity measurements to occur without corrupting the demodulation of the desired signal. While the received signal is being buffered, a single receiver makes a performance measurement on each of two antennas in sequence during the beginning of a received data burst, the beginning of the burst being determined by a timing signal fed back from a previous burst. The previously unused antenna is measured first to minimize the likelihood of having to perform two antenna switches. Also while the received signal is buffered, timing recovery and frequency offset correction are performed.