Abstract: A method for communicating through a multiple access communication interface includes receiving a first signal from a first tag, where the first signal is spread using a predetermined pseudo-noise (PN) code, and further where the first signal includes first payload data. A second signal is received from a second tag. The second signal is spread using the predetermined PN code, and the second signal includes second payload data. The first payload data from the first signal is identified at least in part with a PN array despreader. The second payload data from the second signal is also identified at least in part with the PN array despreader.

Abstract: A method of processing data based on programmed instructions includes referencing a number of locations in memory by forming addresses and correct buffer mappings corresponding to separate buffers in the plurality of buffers, and communicating data from the referenced locations in memory to a processing unit. The processing unit concurrently receives inputs from the separate buffers in the plurality of buffers and outputs to another buffer in the plurality of buffers.

Abstract: A method of compensating for doppler phase errors includes receiving a signal at a receiver wherein the signal is spread using a pseudo-noise code, dividing the signal into a plurality of smaller coherent units and then compensating for induced doppler phase errors by analyzing the plurality of smaller coherent units. Analysis may include producing a plurality of coherent sums by summing across the smaller coherent units and then summing non-coherently the plurality of coherent sums. Analysis may also include demodulating a symbol from the smaller coherent units. A modulation technique may be selected from a plurality of modulation techniques and then be used to encode and transmit a symbol stream.

Abstract: A method of determining the location of a communication tag in a random phase multiple access communication network is disclosed. A ranging request signal that is spread using a first pseudo-noise code and offset with a first random timing offset is transmitted at a first time. A ranging response signal that is spread using a second pseudo-noise code and offset with a second random timing offset is received at a second time. A propagation delay that is dependent on the first time and the second time is calculated.

Abstract: A method for de-spreading spread data includes receiving a data stream by multiple access communication where the received data stream is spread using a pseudo-noise (PN) code; multiplying a first portion of the received data stream including data from a first user by a first portion of a PN signal to obtain a first product; providing the first product to a first counter; multiplying a second portion of the received data stream including data from a second user by the first portion of the PN signal to obtain a second product; providing the second product to a second counter; and determining whether the first portion of the PN signal and the second portion of the PN signal produce valid sequences based at least in part on the first product and the second product.

Abstract: A method of determining the location of a communication tag in a random phase multiple access communication network is disclosed. A ranging request signal that is spread using a first pseudo-noise code and offset with a first random timing offset is transmitted at a first time. A ranging response signal that is spread using a second pseudo-noise code and offset with a second random timing offset is received at a second time. A propagation delay that is dependent on the first time and the second time is calculated.

Abstract: A method for communicating through a multiple access communication interface includes receiving a first signal from a first tag, where the first signal is spread using a predetermined pseudo-noise (PN) code, and further where the first signal includes first payload data. A second signal is received from a second tag. The second signal is spread using the predetermined PN code, and the second signal includes second payload data. The first payload data from the first signal is identified at least in part with a PN array despreader. The second payload data from the second signal is also identified at least in part with the PN array despreader.

Abstract: A method of communicating through a random phase multiple access network is provided. A signal that has been spread using a pseudo-noise code and offset by a random timing offset and that contains payload data is received from a device. A destination is selected for the payload data based on a characteristic of the multiple access network. The payload data is transmitted to the selected destination.

Abstract: A method for communicating through a multiple access communication interface includes receiving a first signal from a first tag, where the first signal is spread using a predetermined pseudo-noise (PN) code, and further where the first signal includes first payload data. A second signal is received from a second tag. The second signal is spread using the predetermined PN code, and the second signal includes second payload data. The first payload data from the first signal is identified at least in part with a PN array despreader. The second payload data from the second signal is also identified at least in part with the PN array despreader.

Abstract: A tangible storage medium stores code which permits handling of unwanted calls from callers such as telemarketers, when caller identification is provided. In one embodiment, the called party adds the caller identification information for the telemarketer to a personal list after receiving the unwanted call. Subsequent calls from the telemarketer are intercepted. In a second embodiment, the called party identifies the telemarketer by detecting the caller identification information before answering the call. By providing a screen listing indication, the caller identification information is added to the called party's personal list before the call is completed, permitting the call to be intercepted and while future calls from the telemarketer to be intercepted.

Abstract: A method for de-spreading spread data includes receiving a data stream by multiple access communication where the received data stream is spread using a pseudo-noise (PN) code; multiplying a first portion of the received data stream including data from a first user by a first portion of a PN signal to obtain a first product; providing the first product to a first counter; multiplying a second portion of the received data stream including data from a second user by the first portion of the PN signal to obtain a second product; providing the second product to a second counter; and determining whether the first portion of the PN signal and the second portion of the PN signal produce valid sequences based at least in part on the first product and the second product.

Abstract: A method of establishing communication at a tag includes calculating a metric for each of a plurality of automatic frequency control (AFC) hypotheses where the plurality of AFC hypotheses correspond to a timing used by an access point; based on the calculated metrics, identifying one or more relevant AFC hypotheses; performing a check on a demodulated data stream identified using the one or more relevant AFC hypotheses; identifying a valid AFC hypothesis based at least in part on the check; and determining where a frame starts based at least in part on the check.

Abstract: A tangible storage medium stores code which permits handling of unwanted calls from callers such as telemarketers, when caller identification is provided. In one embodiment, the called party adds the caller identification information for the telemarketer to a personal list after receiving the unwanted call. Subsequent calls from the telemarketer are intercepted. In a second embodiment, the called party identifies the telemarketer by detecting the caller identification information before answering the call. By providing a screen listing indication, the caller identification information is added to the called party's personal list before the call is completed, permitting the call to be intercepted and while future calls from the telemarketer to be intercepted.

Abstract: A method of multi-mode communications includes receiving signals from multiple sources at a plurality of sample buffers, referencing the plurality of sample buffers for a first source at one time and referencing the plurality of sample buffers for a second source at another time, and communicating data from the referenced plurality of sample buffers to a processing unit. The processing unit concurrently receives inputs from buffers in the plurality of sample buffers and outputs to other buffers in the plurality of sample buffers.

Abstract: A method and apparatus permit handling of unwanted calls from callers such as telemarketers, when caller identification is provided. In one embodiment, the called party adds the caller identification information for the telemarketer to a personal list after receiving the unwanted call. Subsequent calls from the telemarketer are intercepted. In a second embodiment, the called party identifies the telemarketer by detecting the caller identification information before answering the call. By providing a screen listing indication, the caller identification information is added to the called party's personal list before the call is completed, permitting the call to be intercepted and while future calls from the telemarketer to be intercepted.

Abstract: A method and apparatus permit handling of unwanted calls from callers such as telemarketers, when caller identification is provided. In one embodiment, the called party adds the caller identification information for the telemarketer to a personal list after receiving the unwanted call. Subsequent calls from the telemarketer are intercepted. In a second embodiment, the called party identifies the telemarketer by detecting the caller identification information before answering the call. By providing a screen listing indication, the caller identification information is added to the called party's personal list before the call is completed, permitting the call to be intercepted and while future calls from the telemarketer to be intercepted.

Abstract: A method and apparatus permit handling of unwanted calls from callers such as telemarketers, when caller identification is provided. In one embodiment, the called party adds the caller identification information for the telemarketer to a personal list after receiving the unwanted call. Subsequent calls from the telemarketer are intercepted. In a second embodiment, the called party identifies the telemarketer by detecting the caller identification information before answering the call. By providing a screen listing indication, the caller identification information is added to the called party's personal list before the call is completed, permitting the call to be intercepted and while future calls from the telemarketer to be intercepted.

Abstract: A method and apparatus permit handling of unwanted calls from callers such as telemarketers, when caller identification is provided. In one embodiment, the called party adds the caller identification information for the telemarketer to a personal list after receiving the unwanted call. Subsequent calls from the telemarketer are intercepted. In a second embodiment, the called party identifies the telemarketer by detecting the caller identification information before answering the call. By providing a screen listing indication, the caller identification information is added to the called party's personal list before the call is completed, permitting the call to be intercepted and while future calls from the telemarketer to be intercepted.

Abstract: A method of multi-mode communications includes receiving signals from multiple sources at a plurality of sample buffers, referencing the plurality of sample buffers for a first source at one time and referencing the plurality of sample buffers for a second source at another time, and communicating data from the referenced plurality of sample buffers to a processing unit. The processing unit concurrently receives inputs from buffers in the plurality of sample buffers and outputs to other buffers in the plurality of sample buffers.

Abstract: An apparatus and method for demodulation of a composite signal containing a plurality of multi-path components use a virtual finger. The method includes buffering digital samples of a signal into a first memory element, randomly accessing the digital samples from the first memory element to correlate a particular multi-path component from the signal, and iteratively accumulating the correlated particular multi-path component into a second memory element.