OFDM modem for transmission of continuous complex numbers
First Claim
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1. A wireless video transmitter comprising:
- a symbol mapper to map a first component of a value associated with a video frame to a fine constellation point of a fine transmission symbol plane, wherein the fine transmission symbol plane is defined by groups or constellations of fine symbol points and there is a direct relation between numerical values and spatial proximity of fine symbol points within a given group or constellation of the plane.
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Abstract
The invention enables the transmission of continuous complex numbers using a symbol based transmission scheme such as OFDM. Accordingly, complex numbers are mapped to the constellation map, enabling a fine granularity of constellation points. This scheme may be used, for example, in the transmission of video where the coefficients representing the higher frequency of each of the video components, as well as the quantization error values of the DC and near DC components, or some, possibly non-linear transformation thereof, are sent as pairs of real and imaginary portions of a complex number that comprises a symbol.
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20 Claims
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1. A wireless video transmitter comprising:
a symbol mapper to map a first component of a value associated with a video frame to a fine constellation point of a fine transmission symbol plane, wherein the fine transmission symbol plane is defined by groups or constellations of fine symbol points and there is a direct relation between numerical values and spatial proximity of fine symbol points within a given group or constellation of the plane. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A wireless video receiver comprising:
a symbol de-mapper to demap a first received component of a value associated with a video frame using a fine constellation point of a fine transmission symbol plane, wherein the fine transmission symbol plane is defined by groups or constellations of fine symbol points and there is a direct relation between numerical values and spatial proximity of fine symbol points within a given group or constellation of the plane. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
Specification