Abstract: In one aspect, an orthogonal multiple description encoder comprises orthogonal multiple description generation circuitry configured to produce multiple descriptions of a given signal by processing the signal using respective ones of a plurality of orthogonal matrices. Each of the multiple descriptions is generated as a function of the signal and a corresponding one of the plurality of orthogonal matrices. Other aspects include an orthogonal multiple description decoder, orthogonal multiple description encoding and decoding methods, and associated computer program products.

Abstract: A telecommunications system and method which includes a transmitter, a first code generator for generating a noise code and a second code generator for generating a string-based code, wherein data which is transmitted by the transmitter is coded by the first and second code generators before transmission. One of the code generators preferably comprises a pseudorandom noise generator, and the other code generator preferably comprises a cyclic redundancy checking coder for assisting in deskewing of data. The telecommunications system allows the transmitter to dynamically request additional bandwidth from the telecommunications provider in order to efficiently transmit data. The present telecommunications system also substantially reduces skew experienced between the transmitter and the receiver.

Abstract: A telecommunications system and method which includes a transmitter, a first code generator for generating a noise code and a second code generator for generating a string-based code, wherein data which is transmitted by the transmitter is coded by the first and second code generators before transmission. One of the code generators preferably comprises a pseudorandom noise generator, and the other code generator preferably comprises a cyclic redundancy checking coder for assisting in deskewing of data. The telecommunications system allows the transmitter to dynamically request additional bandwidth from the telecommunications provider in order to efficiently transmit data. The present telecommunications system also substantially reduces skew experienced between the transmitter and the receiver.

Abstract: A telecommunications system and method which includes a transmitter, a first code generator for generating a noise code and a second code generator for generating a string-based code, wherein data which is transmitted by the transmitter is coded by the first and second code generators before transmission. One of the code generators preferably comprises a pseudorandom noise generator, and the other code generator preferably comprises a cyclic redundancy checking coder for assisting in deskewing of data. The telecommunications system allows the transmitter to dynamically request additional bandwidth from the telecommunications provider in order to efficiently transmit data. The present telecommunications system also substantially reduces skew experienced between the transmitter and the receiver.

Abstract: A phase tracker receives a signal component xn and forms a phase- and gain-corrected signal zn. In particular, the phase tracker performs a Hilbert transform of xn to produce a quadrature phase component yn to form the constellation defined by (xn, yn). Consequently, phase rotation and gain adjustment are combined into a linear transform of the constellation defined by (xn, yn). The linear transform zn=&agr;xn+&bgr;yn employs two coefficients &agr; and &bgr;. The coefficients &agr; and &bgr; of the linear transform are derived so as to provide an optimal solution according to minimum mean square error. Approximations to the coefficients &agr; and &bgr; of the linear transform may be iteratively determined with a stochastic gradient method. Advantages of employing the phase- and gain-corrected signal zn as an I-phase detection result of a demodulator include 1) the phase rotation and gain adjustment are combined into one operation, and 2) the a sine/cosine lookup table is not employed.

Abstract: A system is described for arraying multi-device processing nodes in a 3-dimensional computing architecture and for flexibly connecting their ports. The topology of each processing node is of a fixed and constant physical geometry. The nodes may comprise a digital signal processor chip, a static RAM, and a communications and network controller. The nodes are mounted on boards. Selective connection of ports of each board to ports of another adjacent board is effected by a routing and spacer element having internal routing paths.