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Method and arrangement for dynamic allocation of multiple carrier-wave channels for multiple access by frequency division multiplexing

Kahre Ragnar
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TLDR
In this paper, the authors proposed a method and an arrangement for dynamic allocation of multiple carrier wave channels for multiple access by frequency division multiplexing (FDM) for flexible data speed and continuous transmission, where a wider frequency band is divided into a number of subbands with a modulated carrier wave in each subband.
Abstract: 
The invention relates to a method and an arrangement for dynamic allocation of multiple carrier wave channels for multiple access by frequency division multiplexing. The invention provides a number of mobile units with the possibility of flexible data speed and continuous transmission. On the fixed side, the number of transmitters and receivers can be minimized by utilizing broadband receivers which serve a number of mobiles. According to the invention, a wider frequency band is divided into a number of subbands with a modulated carrier wave in each subband. To vary the transmission speed, such a number of subbands is allocated as is needed by each user in order to cover the data clock requirement. Broadband transmitters/receivers handle the transmission over the entire accessible band. Oversampling is preferably carried out in the frequency demultiplexing in order to permit the best sampling time to be selected for the different frequency gaps.

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Citations
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TL;DR: In this article, the authors proposed two time-slotted CDMA (TDD) and orthogonal frequency division multiplexing (OFDM) techniques for omni-beam and narrow-beam fixed wireless loop (FWL) systems.
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Systems and method for orthogonal frequency divisional multiplexing

Mark J. Dapper, +28 more
TL;DR: In this article, a multi-carrier orthogonal frequency division multiplexing (OFDM) system is presented, where a receiver is configured to de-modulate symbols from at least one of a plurality of spectrally overlapping carrier signals to produce a receiver output, and a transmitter is modulated to modulate symbols onto at least a fraction of the overlapping signals to determine when a collision has occurred on the first carrier.
References
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Journal ArticleDOI

Analysis and Simulation of a Digital Mobile Channel Using Orthogonal Frequency Division Multiplexing

Jr. L.J. Cimini
- 01 Jul 1985 - 
TL;DR: The analysis and simulation of a technique for combating the effects of multipath propagation and cochannel interference on a narrow-band digital mobile channel using the discrete Fourier transform to orthogonally frequency multiplex many narrow subchannels, each signaling at a very low rate, into one high-rate channel is discussed.
Journal ArticleDOI

Data Transmission by Frequency-Division Multiplexing Using the Discrete Fourier Transform

Stephen B. Weinstein, +1 more
- 01 Oct 1971 - 
TL;DR: The Fourier transform data communication system is described and the effects of linear channel distortion are investigated and a differential phase modulation scheme is presented that obviates any equalization.
Journal ArticleDOI

Introduction to spread-spectrum antimultipath techniques and their application to urban digital radio

G.L. Turin
TL;DR: Results of analyses and simulations of various candidate receivers indicated by the theory, as they perform through urban/suburban multipath show that megabit-per-second rates through urban multipath are quite feasible.

Principles of Modulation and Channel Coding for Digital Broadcasting for Mobile Receivers

M. Alard
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Method and apparatus for dynamic channel bandwidth allocation among multiple parallel video coders

Hsueh-Ming Hang
TL;DR: In this article, a dynamic channel allocation unit (103) specifies a bit rate for each video coder in a set of parallel video coders (102-1102-N) comprising an overall video coding system.