Patent
Continuously adjusted-bandwidth discrete-time phase-locked loop
TLDR
In this paper, the authors propose a system for correcting phase errors in an information signal which has been transmitted, which consists of circuitry for generating a correction signal and for combining the correction signal with the information signal to produce a corrected information signal.Abstract:
A user equipment which receives a CDMA communication signal that is wirelessly transmitted includes a system for correcting phase errors in an information signal which has been transmitted. The correction system comprises circuitry for generating a correction signal and for combining the correction signal with the information signal to produce a corrected information signal. An analyzer analyzes the phase of the corrected information signal and generates an error signal based on the deviation of the analyzed phase from a reference phase. A bandwidth controller recursively adjusts the phase of the corrected information signal such that the phase of said corrected information signal is substantially equal to said reference phase. The bandwidth controller selects a bandwidth within an adjustable range based on the error signal, estimates an offset based on the error signal, and modifies the correction signal using the offset.read more
Citations
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Patent
Modified preamble structure for ieee 802.11a extensions to allow for coexistence and interoperability between 802.11a devices and higher data rate, mimo or otherwise extended devices
TL;DR: A modified preamble is used by extended devices that operate at higher rates, such as MIMO or other extensions relative to strict 802.11a-compliant devices.
Patent
System and method for CDMA channel estimation
TL;DR: In this article, a wideband CDMA receiver system to accept messages from asynchronously transmitting base stations is provided, where the base station transmission to each receiver includes a perch channel and at least one traffic channel.
Patent
Method and system of integrated rate control for a traffic flow across wireline and wireless networks
TL;DR: In this article, a method and system of integrated rate control for a traffic flow extending across wireline and wireless networks includes determining a power indicator for a wireless link of traffic flow between a source and a mobile device.
Patent
Method and apparatus for acquiring and tracking pilots in a cdma communication system
TL;DR: In this article, frequency acquisition of a number of signal instances (i.e., multipaths) in a received signal may be achieved concurrently based on a frequency control loop (RAFC) maintained for each finger processor of a rake receiver.
Patent
Method and apparatus for performing frequency tracking based on diversity transmitted pilots in a CDMA communication system
TL;DR: In this paper, a frequency tracking loop is provided to acquire and track the multipath, and supports a number of loop modes (e.g., acquisition and tracking modes) each loop mode may be associated with a respective frequency detector and a set of values for the set of elements in the loop.
References
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Patent
Pseudorandom noise ranging receiver which compensates for multipath distortion by dynamically adjusting the time delay spacing between early and late correlators
TL;DR: In this paper, the authors proposed a receiver for pseudorandom noise (PRN) encoded signals consisting of a sampling circuit, multiple carrier and code synchronizing circuits, and multiple digital autocorrelators.
Patent
Method and apparatus for operating an indoor CDMA telecommunications system
TL;DR: In this paper, a method and apparatus is provided for the overlaid operation of two or more wireless communication systems where one of the two systems is a small-scale or indoor system and the other is a large scale or outdoor system.
Patent
System for using rapid acquisition spreading codes for spread-spectrum communications
Fatih M. Ozluturk,Gary R. Lomp +1 more
TL;DR: In this article, the first long code and the second long code are transmitted at an in-phase (I) and at a quadrature-phase(Q) angle, respectively, on the carrier signal using radio waves.
Patent
Method and apparatus for coherent communication reception in a spread-spectrum communication system
TL;DR: In this article, a received reference symbol coded spread-spectrum communication signal is despread with a spreading code to derive a stream of reference samples (152) and stream of data samples (158) and an offset frequency detector (443) determines an offset to be applied to the received signal via a frequency locked loop.
Patent
Multi-channel digital receiver for global positioning system
TL;DR: In this paper, a receiver for pseudorandom noise (PRN) encoded signals consisting of a sampling circuit and multiple channel circuits, with each channel circuit including a carrier and code synchronizing circuit, and multiple digital correlators with dynamically adjustable code delay spacing.