System and Method for Configurable Multi-standard Receiver
A configurable multi-standard receiver. A receiver comprises a mixer, a processing module and an analog to digital converter is disclosed to receive multi-standard radio signals. The processing module includes a first selection switch and first parameter control, where the first selection switch configures the processing module as a complex filter or a real-valued filter and the first parameter control configures the characteristics of the filter. Furthermore, the analog to digital converted is preferably implemented using sigma delta modulation to achieve a desired noise shaping. The sigma delta modulation comprises a second selection switch and second parameter control. The second selection switch configures the sigma delta modulation to function as a unit having a complex loop filter or a unit having real-valued loop filters. The second parameter control configures the characteristics of the loop filter. The settings for the first and second selection switches and the first and second control parameters may be stored in a control register.
1 . A multi-standard radio receiver configurable to operate in a plurality of operation modes, comprising:
a mixer coupled to an input signal and a local oscillation signal to provide a mixer output signal, wherein the mixer output signal comprises an in-phase signal and a quadrature signal;
a processing module coupled to receive the mixer output signal having a first control, wherein the first control configures the processing module based on the plurality of operation modes; and
an analog to digital converter (ADC) having a second control, wherein the second control configures the ADC based on the plurality of operation modes.
2 . The multi-standard radio receiver of claim 1 , wherein the processing module comprises a filter and the first control configures the filter as a filter type selected from a group comprising a complex filter and a real-valued filter based on the plurality of operation modes.
3 . The multi-standard radio receiver of claim 2 , wherein the first control further configures filter characteristic of the filter based on the plurality of operation modes.
4 . The multi-standard radio receiver of claim 1 , wherein the ADC is implemented based on sigma delta modulation.
5 . The multi-standard radio receiver of claim 4 , wherein the second control configures the ADC as a converter type selected from a group comprising a complex ADC and a real-valued ADC based on the plurality of operation modes.
6 . The multi-standard radio receiver of claim 1 , wherein frequency of the local oscillation signal is adjusted based on the plurality of operation modes.
7 . The multi-standard radio receiver of claim 6 , wherein the frequency of the local oscillation signal is adjusted to cause the mixer output signal to include an IF signal type selected from a group comprising a zero IF signal and a low IF signal of a desired signal in the input signal.
8 . The multi-standard radio receiver of claim 7 , wherein the low IF signal has an IF frequency less than five times channel spacing.
9 . The multi-standard radio receiver of claim 1 , comprising a programmable control register to provide a first control signal to the first control and a second control signal to the second control, wherein the programmable control register is programmed based on the plurality of operation modes.
10 . An integrated multi-standard television tuner configurable to operate in a plurality of operation modes, comprising:
a RF circuit coupled to receive a RF input signal to amplify the RF input signal;
a mixer coupled to receive the amplified RF input signal and a local oscillation signal to provide a mixer output signal, wherein the mixer output signal comprises an in-phase signal and a quadrature signal;
a processing module coupled to receive the mixer output signal having a first control, wherein the first control configures the processing module based on the plurality of operation modes; and
an analog to digital converter having a second control, wherein the second control configures the analog to digital converter (ADC) based on the plurality of operation modes;
wherein the RF circuit, the mixer, the processing module and the analog to digital converter are integrated on a same semiconductor substrate.
11 . The integrated multi-standard television tuner of claim 10 , wherein the processing module comprises a filter and the first control configures the filter as a filter type selected from a group comprising a complex filter and a real-valued filter based on the plurality of operation modes.
12 . The integrated multi-standard television tuner of claim 11 , wherein the first control further configures filter characteristic of the filter based on the plurality of operation modes.
13 . The integrated multi-standard television tuner of claim 10 , wherein the ADC is implemented based on sigma delta modulation.
14 . The integrated multi-standard television tuner of claim 13 , wherein the second control configures the ADC as a converter type selected from a group comprising a complex ADC and a real-valued ADC based on the plurality of operation modes.
15 . The integrated multi-standard television tuner of claim 10 , wherein frequency of the local oscillation signal is adjusted based on the plurality of operation modes.
16 . The integrated multi-standard television tuner of claim 15 , wherein the frequency of the local oscillation signal is adjusted to cause the mixer output signal to include an IF signal type selected from a group comprising a zero IF signal and a low IF signal of a desired signal in the input signal.
17 . The integrated multi-standard radio receiver of claim 16 , wherein the low IF signal has an IF frequency less than five times channel spacing.
18 . The integrated multi-standard radio receiver of claim 17 , comprising a programmable control register to provide a first control signal to the first control and a second control signal to the second control, wherein the programmable control register is programmed based on the plurality of operation modes.
19 . A method of demodulating a multi-standard radio signal using a configurable receiver having a plurality of operation modes, the method comprising:
mixing an input signal and a local oscillation signal to provide a mixer output signal, wherein the mixer output signal comprises an in-phase output signal and a quadrature output signal;
filtering the mixer output signal using a configurable filter, wherein the configurable filter is configured as a real-valued filter or a complex filter based on the plurality of operation modes; and
converting the filtered mixer output signal into a digital signal using a configurable sigma delta modulator (SDM), wherein the configurable SDM is configured as a real-valued SDM or a complex SDM based on the plurality of operation modes.