Abstract:
A method and system for providing acknowledgment and/or data rate control (DRC) information with respect to data packets conveyed on a plurality of active forward link (FL) carriers. The number of reverse link (RL) carriers employed for the acknowledgment and/or DRC information may be less than the number of active FL carriers, and may be a single carrier, even when the signaling protocol is, in the limit, consistent with presently-supported standardized CDMA protocols. Code multiplexing techniques are employed inventively to convey information for up to fifteen FL carriers on a single, standard CDMA channel designed to provide such signaling for only a single FL carrier at a time.
Abstract:
A method and system is disclosed for providing an automatic gain control in signal processing. After receiving a stream of analog signals, a gain is adjusted on the received analog signals using a first set of gain compensation parameters. Then, the adjusted analog signals are converted to digital signals. A predetermined number of digital signals are collected from the converted digital signals within a predetermined time period. The collected digital signals are delayed from being transferred out for further demodulation processing for a predetermined delay time. At the same time, a second set of gain compensation parameters are estimated based on the collected digital signals. The estimated second set of gain compensation parameters are applied to the delayed digital signals.
Abstract:
Provided are digital processing apparatuses and techniques for estimating the fractional exponentiation of the base number 2, i.e., 2f where f is a fractional value. In one representative embodiment, a calculation is made of a folded quantity, which is equal to 1−f if f is greater than a specified threshold and is equal to f otherwise; then, a function of the folded quantity is calculated; and finally, the function of the folded quantity is subtracted from the fraction f and 1 is added. In another embodiment, 2f is approximated by calculating 1+f′ in the binary numbering system.
Abstract:
A novel method and apparatus for initiating a reverse link intergenerational handoff in a CDMA communication system is disclosed. The inventive reverse link intergenerational handoff initialization method and apparatus measures and compares parameters between a serving base station of one generation and a target base station of another generation to determine the best possible handoff initiation time instant for performing a reverse link intergenerational hard handoff. The method and apparatus can utilize one of several embodiments to determine the best possible handoff initiation time instant. A pilot signal strength embodiment determines a handoff initiation time instant based upon the total pilot signal strength of both a serving and target base station. The Eb/Nt embodiment determines a handoff initiation time instant based upon Eb/Nt (ratio of average power per bit to total received power spectral density) values of both a serving and a target base station. The disclosed method and apparatus decreases the probability of degraded or dropped calls during intergenerational handoffs.
Abstract:
Extending acknowledgement messages from two states to at least three states is described, whereby such messages constitute a packet quality indication (PQI) reflecting quality or usability of the received signal. In an HARQ system, a transmitting station can flexibly select a better alternative for the next information to transmit on the basis of such PQI. One aspect includes determining how best to correct an unsuccessful packet transmission based on quality information about the specific packet. Implementing apparatus and procedures are described.
Abstract:
An apparatus comprising a first circuit and a second circuit. The first circuit may be configured to generate a data output signal in response to a data input signal, a valid word signal, and a select signal. The second circuit may be configured to generate the select signal in response to the valid word signal, a start of frame signal, and end of frame signal and the data output signal. The select signal may adjust a starting point of each of the words to match a starting point of the first word.
Abstract:
A mobile device and associated method for transmitting a plurality of characters to a remote device without requiring keypad input or character recognition. The device is operable to receive characters entered by the user via handwritten input and transmit the characters without requiring character recognition. User input is received to a screen of the wireless handheld device, wherein the user input comprises handwritten text having a plurality of characters, e.g., in a non-Latin character set. Data corresponding to an image of the handwritten text may be compressed, packaged, and transmitted to a remote device in a wireless fashion. The compressed data is useable to create the image of the handwritten text on the remote device. The method preferably does not perform any character recognition on the handwritten text.
Abstract:
A lock detector receives a feedback signal from a phase-locked loop and a reference signal. The lock detector includes a first generator for receiving the reference and feedback signals, and for sampling the feedback signal with the reference signal. A second generator is coupled to the first generator for incrementing a count when the feedback signal is at different polarities at consecutive edges of the reference signal. An output line, for asserting a phase lock when the count reaches a defined value, is coupled to the second generator.
Abstract:
An apparatus comprising an encoder circuit and a transcoder circuit. The encoder circuit may be configured to generate a bitstream comprising a series of packets in response to a speech input signal. The transcoder circuit may be configured to generate an intermediate bitstream in response to the bitstream. The transcoder (a) implements (i) a first encoding type comprising a selectable mode voice (SMV) encoding or (ii) a second encoding type comprising an enhanced variable rate (EVR) encoding in response to a type of data in each of the packets of the bitstream and (b) the first or second encoding type is selected on a per packet basis.
Abstract:
An apparatus comprising a first quantizer circuit, a memory and a second quantizer circuit. The first quantizer circuit may be configured to generate a first intermediate signal in response to (i) an input signal and (ii) a first scaling signal. The memory may be configured to (i) store the first intermediate signal and (ii) present a second intermediate signal, in response to an address signal. The second quantizer circuit may be configured to generate an output signal in response to (i) the second intermediate signal and (ii) a second scaling signal. The second quantizer circuit has a bit-width greater than the bit-width of the first quantizer circuit.