Method, apparatus and system for high-speed transmission

Abstract

Multi-carrier modulation systems constructed using a series of electrical carriers, modulating the data on the electrical carriers and combining the carriers to form a wideband signal. Multi-carrier modulation may be applied to existing channels, which may be of lower quality. An adaptive multi-carrier modulation transmitter may characterize an existing channel and ascertain the overall characteristics of the channel. The transmitter and receiver can then be configured to use various bandwidths and various modulations in order to match the transfer characteristic of the channel. A series of adaptive multi-carrier modulation transmitters and receivers can be integrated on a single integrated circuit. If multiple adaptive receivers and transmitters are integrated on a single integrated circuit, they may be used to upgrade existing networks to achieve any capacity desired. Each receiver and transmitter may characterize the channel and may configure the modulation and bandpass to the channel's characteristics.

1 - 25 . (canceled) 
     
     
         26 . A transmitter unit for use in a multi-carrier communication system, comprising:
 one or more encoders operative to encode one or more data streams;   one or more symbol mapping elements operative to receive and map data from the one or more encoded data streams to generate modulation symbols, wherein each modulation symbol corresponds to a plurality of data values;   an inverse Fourier transform operative to receive the modulation symbols and to generate a time-domain representation of the modulation symbols; and   a modulator operable to receive and modulate the time-domain representation of the modulation symbols to provide a modulated signal.   
     
     
         27 . The transmitter unit of  claim 26 , wherein the one or more encoders are convolutional coders. 
     
     
         28 . The transmitter unit of  claim 26 , wherein the one or more symbol mapping elements are symbol encoders. 
     
     
         29 . The transmitter unit of  claim 26 , wherein each modulation symbol is complex. 
     
     
         30 . The transmitter unit of  claim 26 , wherein the transmitter unit further comprises a multiplexer operable to receive and combine elements of the time-domain representation of the modulation symbols. 
     
     
         31 . The transmitter unit of  claim 26  wherein the transmitter unit is integrated within a single integrated circuit. 
     
     
         32 . The transmitter unit of  claim 26  wherein the inverse Fourier transform comprises an inverse fast Fourier transform. 
     
     
         33 . A method of transmitting data in a multi-carrier communication system, comprising:
 encoding one or more data streams;   mapping data from the one or more encoded data streams to generate modulation symbols, wherein each modulation symbol corresponds to a plurality of data values;   performing an inverse Fourier transform on the modulation symbols to generate a time-domain representation of the modulation symbols; and   modulating the time-domain representation of the modulation symbols to provide a modulated signal.   
     
     
         34 . The method of  claim 33 , wherein encoding the one or more data streams comprises convolutionally coding the one or more data streams. 
     
     
         35 . The method of  claim 33 , wherein each modulation symbol is complex. 
     
     
         36 . The method of  claim 33 , further comprising receiving and combining elements of the time-domain representation of the modulation symbols. 
     
     
         37 . The method of  claim 33  wherein the inverse Fourier transform comprises an inverse fast Fourier transform.