Radio receiver supporting multiple modulation formats with a single pair of ADCs
First Claim
1. A method for a wireless receiver capable of handling signals of different modes by a common ADC (analog-to-digital converter), comprising;
- receiving a transmitted radio frequency (RF) signal;
down-converting the transmitted RF signal into a baseband signal;
analog-to-digital converting the baseband signal into a primary digital signal with a basic data rate by the common ADC (analog-to-digital converter);
processing the primary digital signal according to a first data rate not higher than the basic data rate to detect whether the primary digital signal with the first data rate carries information of a first predetermined mode;
down-converting the primary digital signal into a second data rate lower than the basic data rate and then processing the primary digital signal according to the second data rate to detect whether the primary digital signal with the second data rate carries information of a second predetermined mode; and
temporarily stopping processing the primary digital signal according to the second data rate when the information in the primary digital signal meets the first predetermined mode, or temporarily stopping processing the primary digital signal according to the first data rate when the information in the primary digital signal meets the second predetermined mode;
wherein the basic data rate is an integer multiple of the data rate of a least distortion-tolerant modulation format corresponding to one of the first predetermined mode and the second predetermined mode.
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Accused Products
Abstract
A radio receiver has an ADC connected to an RF module. Baseband processing modules are connected to the ADC, and a power control module is connected to each of the baseband processing modules. Each of the baseband processing modules is capable of performing detection, demodulation, time and frequency synchronization, decoding, and de-scrambling of signals of a respective modulation format among numerous modulation formats. At least one of the baseband processing modules also has a rate converter connected to the ADC for converting a data rate of signals output from the ADC to a data rate of the corresponding modulation format of that baseband processing module. The power control module is connected to the baseband processing modules and controls power to the baseband processing modules according to signals received from the baseband processing modules.
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Citations
15 Claims
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1. A method for a wireless receiver capable of handling signals of different modes by a common ADC (analog-to-digital converter), comprising;
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receiving a transmitted radio frequency (RF) signal; down-converting the transmitted RF signal into a baseband signal; analog-to-digital converting the baseband signal into a primary digital signal with a basic data rate by the common ADC (analog-to-digital converter); processing the primary digital signal according to a first data rate not higher than the basic data rate to detect whether the primary digital signal with the first data rate carries information of a first predetermined mode; down-converting the primary digital signal into a second data rate lower than the basic data rate and then processing the primary digital signal according to the second data rate to detect whether the primary digital signal with the second data rate carries information of a second predetermined mode; and temporarily stopping processing the primary digital signal according to the second data rate when the information in the primary digital signal meets the first predetermined mode, or temporarily stopping processing the primary digital signal according to the first data rate when the information in the primary digital signal meets the second predetermined mode; wherein the basic data rate is an integer multiple of the data rate of a least distortion-tolerant modulation format corresponding to one of the first predetermined mode and the second predetermined mode. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless receiver capable of handling signals of different modes, comprising:
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an antenna for receiving transmitted radio frequency (RF) signal; an RF module for down-converting the transmitted RF signal into a baseband signal; a common ADC (analog-to-digital converter) for analog-to-digital converting the baseband signal into a primary digital signal with a basic data rate; a first baseband processing module for processing the primary digital signal according to a first data rate not higher than the basic data rate to detect whether the primary digital signal with the first data rate carries information meeting a first predetermined mode; a second baseband processing module comprising; a sample rate converter for down-converting the basic data rate into a second data rate lower than the basic data rate; and a baseband processor for processing the primary digital signal with the second data rate to detect whether the primary digital signal with the second data rate carries information meeting a second predetermined mode; and a power control module for temporarily switching one of the first and second baseband processing modules into a power saving mode when the other of the first and second baseband processing modules detects that the primary digital signal carries information meeting a corresponding predetermined mode; wherein the basic data rate is an integer multiple of the data rate of a least distortion-tolerant modulation format corresponding to one of the first predetermined mode and the second predetermined mode. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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Specification