Patent
Multi-channel digital transceiver and method
Smith Paul Fielding,John M Smith,Rottinghaus Alan P,Sheila Marie Rader,Pinckley Danny Thomas,Yuda Yehuda Luz,Daniel Morris Lurey,Kevin M. Laird,Tony Kobrinetz,Elder Robert C,Donald E Bailey +10 more
TLDR
In this article, a multi-channel digital transceiver (400) receives uplink radio frequency signals and converts these signals to digital intermediate frequency signals (DIF) using a digital converter module (426).Abstract:
A multi-channel digital transceiver (400) receives uplink radio frequency signals and converts these signals to digital intermediate frequency signals. Digital signal processing, including a digital converter module (426), is employed to select digital intermediate frequency signals received at a plurality of antennas (412) and to convert these signals to baseband signals. The baseband signals are processed to recover a communication channel therefrom. Downlink baseband signals are also processed and digital signal processing within the digital converter module (426) up converters and modulates the downlink baseband signals to digital intermediate frequency signals. The digital intermediate frequency signals are converted to analog radio frequency signals, amplified and radiated from transmit antennas (420).read more
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References
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Book
Fundamentals of digital image processing
TL;DR: This chapter discusses two Dimensional Systems and Mathematical Preliminaries and their applications in Image Analysis and Computer Vision, as well as image reconstruction from Projections and image enhancement.
Patent
System and method for generating signal waveforms in a CDMA cellular telephone system
Klein S. Gilhousen,Irwin M. Jacobs,Roberto Padovani,Lindsay A. Weaver,Wheatley Charles E,Andrew J. Viterbi +5 more
TL;DR: In this paper, a system and method for communicating information signals using spread spectrum communication techniques is presented, where PN sequences are constructed that provide orthogonality between the users so that mutual interference will be reduced, allowing higher capacity and better link performance.
Journal ArticleDOI
An economical class of digital filters for decimation and interpolation
TL;DR: A class of digital linear phase finite impulse response (FIR) filters for decimation and interpolation and use limited storage making them an economical alternative to conventional implementations for certain applications.
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Method and system for providing a soft handoff in communications in a cdma cellular telephone system
TL;DR: In this article, the authors propose a system for directing communications between a mobile user and cell-sites as the mobile user changes cell-site service areas, which includes circuitry responsive to the indication for coupling communications between the mobile users and the other system users via the new cell site while the user remains in communication with the first cell site.
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Diversity receiver in a cdma cellular telephone system
TL;DR: In this paper, a spread spectrum receiver subsystem for utilization in a CDMA cellular telephone having a searcher receiver (44) for scanning the time domain so as to use the PN processing gain and time discrimination properties of spread spectrum coding to determine the location and received signal strength of multiple receptions of a pilot signal traveling upon one or more physical propagation paths to reception.
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