Abstract: An apparatus and method for implementing an equalizer which (1) combines the benefits of a decision feedback equalizer (DFE) with a maximum-a-posterori (MAP) equalizer (or a maximum likelihood sequence estimator, MLSE) (2) performs equalization in a time-forward or time-reversed manner based on the channel being minimum-phase or maximum-phase to provide an equalization device with significantly lower complexity than a full-state MAP device, but which still provides improved performance over a conventional DFE. The equalizer architecture includes two DFE-like structures, followed by a MAP equalizer. The first DFE forms tentative symbol decisions. The second DFE is used thereafter to truncate the channel response to a desired memory of L1 symbols, which is less than the total delay spread of L symbols of the channel. The MAP equalizer operates over a channel with memory of L1 symbols (where L1<=L), and therefore the overall complexity of the equalizer is significantly reduced.

Abstract: A baseband controller system creates and maintains a schedule of synchronized events and reviews the schedule as a part of determining whether to initiate a transmission of a non-synchronous event. One aspect is to avoid a possibility of collision between synchronized and non-synchronized communication events. The schedule of synchronized events are evaluated in relation to the present time and determine whether a non-synchronized event may be transmitted without the likelihood of a collision. The transmission determination includes evaluating future time periods to see if a synchronized event is scheduled during a time period in which the non-synchronized event would continue to be transmitted for those non-synchronized events that span two or more defined time periods in length.

Abstract: Circuitry to remove switches from signal paths in integrated circuit programmable gain attenuators. Programmable gain attenuators and programmable gain amplifiers commonly switch between signal levels using semi-conductor switches. Such switches may introduce non-linearities in the signal. By isolating the switches from the signal path linearity of the PGA can be improved.

Abstract: Provided is a system and method for performing CRC analysis in a video test bench. An exemplary system includes a memory configured for storing a required number representative of the data fields to be analyzed. A module is coupled at least indirectly to the memory and configured for (i) receiving an input data stream, (ii) performing cyclic redundancy check (CRC) analysis of the received data stream, and (iii) producing an output representative of an actual number of received data fields analyzed. The input data stream includes synchronization markers defining boundaries of each of the received data fields. Next, a comparator is configured for (i) comparing the required number and the actual number and (ii) producing a disabling signal when the actual number matches the required number.

Abstract: A data interface includes a network interface processor, a transmitter, and a receiver. The network interface processor is operably coupled to transceive parallel data via a network connection. The transmitter is operably coupled to convert outbound parallel data from the network interface processor into serial transmit data. The receiver is operably coupled to convert serial receive data into inbound parallel data, wherein the receiver provides the inbound parallel data to the network interface processor.

Abstract: A method for direct tuning of a radio receiver begins by providing a plurality of frequency-dependent control input signals to an input of the radio receiver.

Abstract: An improved method and apparatus for using common mode feedback to maintain a predetermined DC level for an intermediate frequency output signal. A common mode feedback capacitor-select switch module is operable to use a bandwidth control signal from a radio interface of a wireless device to selectively connect a plurality of common mode feedback capacitors to an operational amplifier, thereby generating a common mode feedback signal as an input to an active mixer conversion gain module. The predetermined combination of common mode feedback capacitors is used in combination with a plurality of bandwidth capacitors to generate an overall capacitance that maintains the bandwidth of the system at a predetermined value.

Abstract: A method and associated system for effectively increasing the number of antenna elements within a multi-element antenna system through computation of a response of “virtual” antenna elements located along an antenna array. The physical elements of the array are positioned sufficiently near each other to enable synthesis of a polynomial or other mathematical expression characterizing the response of the array to receipt of an incident waveform. Values of the responses associated with the virtual antenna elements of the array may then be determined through evaluation of the synthesized polynomial or other expression. The resultant array response values associated with the virtual and physical elements of the array are then provided to an associated receiver for processing.

Abstract: A wireless cable replacement system. A personal area network, comprising a device having a first wireless transceiver, and an adapter having a second wireless transceiver in communication with the first wireless transceiver, and a plug capable of mating to a jack coupled to a local backbone.

Abstract: A system, method, and apparatus for reducing the video decoder processing requirements are presented herein. During a rewind operation, a reference picture for a group of pictures is decoded and stored into a reference frame buffer. By storing a reference picture for the group, the reference picture need not be decoded to display each picture in the group during the rewind operation.

Abstract: A location tracking apparatus and method are disclosed. In one embodiment, the method comprises receiving information from each repeater indicating which packets wirelessly transmitted by a mobile station were received by each repeater including received signal strength of each of those packets, and determining location of the mobile station with respect to the repeaters based on power levels of individual wirelessly transmitted packets received at the repeaters.

Abstract: A combined sidetone and hybrid balance apparatus and method of operating same are disclosed. An embodiment of the present invention may provide both a hybrid balance mode of operation and a sidetone generation mode of operation within a single integrated circuit device. The functionality provided by an embodiment of the present invention may be used in both Internet protocol (IP)-based telephones and residential gateways, and may be incorporated within the IP telephone chip used in such devices. An embodiment of the present invention may be used to reduce processor demand and the cost of materials, permitting greater IP telephone or residential gateway functionality at lower cost.

Abstract: Efficient LDPC code decoding with new minus operator in a finite precision radix system. A new mathematical operator is introduced and applied to the decoding of LDPC coded signals. This new operator is referred to as the min†? (min-dagger minus) operator herein. This min†? processing is appropriately applied during the updating of the edge messages with respect to the variable nodes. In a bit level decoding approach to decoding LDPC coded signals, the updating of the edge messages with respect to the bit nodes is performed using the new min†? operator. This approach provides very comparable performance to min** processing as also applied to updating of the edge messages with respect to the bit nodes and may also provide for a significant savings in hardware. Also, within finite precision radix systems, the new min†? operator provides a means by which always meaningful results may be achieved during the decoding processing.

Abstract: A low noise amplifier includes an input transistor, an inductor, and a current sink. The input transistor includes a gate, a drain, and a source, wherein the gate of the input transistor is operably coupled to receive an input radio frequency (RF) signal. The inductor includes a first node and a second node, wherein the first node of the inductor is operably coupled to a power supply and the second node of the inductor is operably coupled to the drain of the input transistor to provide an output of the low noise amplifier. The current sink includes a first node and a second node, wherein the first node of the current sink is operably coupled to the source of the input transistor and the second node of the current sink is operably coupled to a circuit ground, wherein a real component of input impedance of the low noise amplifier is substantially constant when the low noise amplifier is in the off mode as when the low noise amplifier is in the on mode.

Abstract: An inductor circuit is disclosed. The inductor circuit includes a first in-silicon inductor and a second in-silicon inductor each having multiple turns. A portion of the multiple turns of the second in-silicon inductor is formed between turns of the first in-silicon inductor. The first and second in-silicon inductors are configured such that a differential current flowing through the first in-silicon inductor and the second in-silicon inductor flows in a same direction in corresponding turns of inductors.

Abstract: A method for encoding an image of a video stream divided into macroblocks comprising determining a maximum of variance of luma blocks in a macroblock, determining if the maximum of variance exceeds a predetermined threshold, determining if the motion vectors of the macroblock are in correlation with a reference macroblock, determining if the macroblock is not an edge macroblock and setting a first quantization level for the macroblock if it meets these conditions and setting a second quantization level for the macroblock if it does not meet these conditions, where the second quantization level is greater than the first quantization level.

Abstract: A system for detecting collisions in a shared communications medium, such as a TDMA medium, includes a receive path adapted to generate a first intermediate signal, a second intermediate signal, and a data symbol sequence from an input signal. A preamble detection module generates a correlation metric from the first intermediate signal. A power measurement module generates a power indication signal from the second intermediate signal. A noise measurement module generates a noise indication signal from the second intermediate signal and the data symbol sequence. A processing module is adapted to characterize the input signal as a collision for certain values of correlation metric, power indication signal, and noise indication signal.

Abstract: The wide bandwidth transceiver includes a receiver section, a transmitter section, and a local oscillation module. The local oscillation module generates a first and a second local oscillation. The transmitter section converts an outbound baseband signal and/or a low intermediate frequency (IF) signal into a first outbound radio frequency (RF) signal based on the second local oscillation when the wide bandwidth transceiver is in a second wireless standard mode and converts the outbound baseband and/or the low IF signal into a second outbound RF signal based on the first and second local oscillations when the wide bandwidth transceiver is in a first wireless standard mode.

Abstract: A programmable transmitter generates a frame preamble to train a receiver with respect to a communication link format that corresponds to a transmission mode wherein the transmission mode may comprise transmitting the communication link over one or more antennas. Generally, the invention includes generating a preamble with an arrangement that depends upon whether a Greenfield (high data rate) or mixed mode transmission is to occur and that depends upon a number of spatial streams that are to be generated. One format for high data rate transmission includes a short training sequence, a long training sequence and a signal field. The mixed mode transmission further includes a legacy prefix.

Abstract: Provided is a system and method for a modem including one or more processing paths. Also included is a number of interconnected modules sequentially arrayed along the one or more paths. Each module is configured to (i) process signals passed along the paths in accordance with the sequence and (ii) implement predetermined functions to perform the processing. Further, each of the modules has a particular degree of functional programmability and the degrees of functional programmability monotonically vary in accordance with the sequence.