Abstract: The present invention relates to a combiner, channel identifier, OFDM receiver and method for optimizing use of channel state information of a received signal. The method comprises analyzing a received signal in a time domain and extracting from the received signal characteristics of a communication channel. The method furthermore comprises determining a dynamic indicator of channel station information accuracy based on the characteristics of the received signal. Additionally, the method comprises applying a weight to the channel state information according to the dynamic indicator.

Abstract: A signal processing unit and a method for using the signal processing unit. The signal processing unit comprising at least two Digital Signal Processors (DSPs) and at least one memory for storing data. The DSP is adapted for signal processing and is capable of accessing the at least one memory. According to an embodiment, the signal processing unit is an Orthogonal Frequency-Division Multiplexing (OFDM) transceiver. The OFDM transceiver is adapted to receive and transmit signals.

Abstract: A method and apparatus is disclosed for performing a synchronization of an incoming series of complex samples of an incoming signal with a known sequence of a plurality of coefficients which represents a pattern within the incoming signal, known to the synchronizer, where the synchronization is performed using a plurality of cross-correlations units.

Abstract: A wireless modem includes an RF module adapted to be connected to an antenna, comprising an intermediate frequency input and an intermediate frequency output, a PHY module receiving the intermediate frequency output and generating the intermediate frequency input, and a low level media access control (LL-MAC) module connected to the PHY and using a direct memory access (DMA) connection for data exchange with a high level media access control module (HL-MAC). A direct memory access (DMA) to computer bus interface module is adapted to be connected to the DMA connection of the LL-MAC and to a computer bus. The DMA interface module responds to the LL-MAC as memory and is adapted to cooperate with the HL-MAC connected to the computer bus. The architecture allows for a modem to be placed on a mini-PCI module with the HL-MAC residing in software on a host computer.

Abstract: There is provided a wireless modem PHY having a selectable IF signal format output, e.g. between baseband, complex IF and low IF.

Abstract: The invention allows for a common integrated circuit PHY of a wireless modem to be used with different RF sections for making different modems by providing different RF adjustment interfaces. The RF adjustment interfaces can be provided by programmable hardware, and in some cases the same programmable hardware that is used for at least some of the MAC section of the modem.

Abstract: A method of frame synchronization for OFDM point-to-multipoint channels is provided according to a first aspect of the invention, wherein sequences of reference frames are inserted at prescribed intervals between sequences of information frames. Each frame comprises a cyclic prefix, composed of two identical segments of data, which is used for locating a frame synchronization starting point by applying a subtraction function on the two segments of data for locating the starting point at the location of the minimum of the function. A method of channel equalization for OFDM channels is also provided according to a second aspect of the invention, wherein the reference frames and data known to a receiver are used for creating an equalization vector for correcting broadcast errors of the information frames received at the receiver side.