Programmable phase mapping and phase rotation modulator and method
First Claim
1. A modulator operative to produce rotated in-phase data and rotated quadrature data in response to receiving symbol data, the modulator comprising:
- a programmable symbol counter operatively responsive to the received symbol data to produce symbol count data based on programmable symbol counter size data; and
symbol phase rotation logic operative to produce the rotated in-phase data and the rotated quadrature data in response to receiving at least the received symbol data, the symbol count data based on the programmable symbol counter size data, and programmable phase rotation size data.
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0 Petitions
Accused Products
Abstract
A modulator (10) and method provides a programmable phase rotation for supporting different modulation formats and different phase rotations. The modulator (10) includes a programmable symbol counter (32) and symbol phase rotation logic (31) operatively responsive to programmable phase rotation size data (36) and programmable counter size data (30). The modulator (10) can be used to communicate with different modulation formats employing different phase rotation conventions as used in different communication systems. The symbol phase rotation logic (31) produces rotated in-phase data (20) and rotated quadrature data (22) in response to receiving at least received symbol data (24), programmable phase rotation size data (36), and symbol count data (32) based on programmable counter size data (30). According to another embodiment, the phase rotations of the modulator (10) may be dynamically selectable such that the phase rotations may be selected to accommodate changes in channel characteristics in real time.
22 Citations
21 Claims
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1. A modulator operative to produce rotated in-phase data and rotated quadrature data in response to receiving symbol data, the modulator comprising:
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a programmable symbol counter operatively responsive to the received symbol data to produce symbol count data based on programmable symbol counter size data; and
symbol phase rotation logic operative to produce the rotated in-phase data and the rotated quadrature data in response to receiving at least the received symbol data, the symbol count data based on the programmable symbol counter size data, and programmable phase rotation size data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A wireless device comprising:
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a baseband signal processor operative to produce symbol data;
a modulator operative to produce rotated in-phase data and rotated quadrature data in response to receiving symbol data, the modulator comprising;
a programmable symbol counter operatively responsive to the received symbol data to produce symbol count data based on at least programmable symbol counter size data;
symbol phase rotation logic operative to produce the rotated in-phase data and the rotated quadrature data in response to receiving;
the received symbol data, the symbol count data based on at least the programmable symbol counter size data, and programmable phase rotation size data;
a transmitter operative produce a transmit signal in response to the rotated in-phase data and the rotated quadrature data; and
an antenna operative to receive the transmit signal. - View Dependent Claims (16, 17)
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18. A method for producing rotated in-phase data and rotated quadrature data comprising:
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receiving symbol data including a plurality of symbols;
producing symbol count data based at least on programmable symbol counter size data in response to receiving each of the plurality of symbols; and
producing the rotated in-phase data and the rotated quadrature data for each of the received plurality of symbols in response to receiving at least the symbol count data based at least on the programmable symbol counter size data, and programmable phase rotation size data. - View Dependent Claims (19, 20, 21)
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Specification