Multi-mode receiver

Abstract

A multi-mode receiver system for processing signals based on a plurality of systems is disclosed. Embodiments of the invention provide for a shared architecture for processing baseband signals corresponding to a plurality of systems.

1 . A method for receiving signals based on a plurality of systems, the method comprising:
 converting a first signal based on a first system to a first baseband signal;   converting a second signal based on a second system to a second baseband signal;   processing the first baseband signal using baseband components; and   processing the second baseband signal using the baseband components.   
     
     
         2 . The method of  claim 1 , wherein the first system and the second system each include at least one of the following systems code-division multiple access, personal-communication service, global-positioning satellite, digital-broadcast satellite, and global system for mobile communications. 
     
     
         3 . The method of  claim 1 , wherein the processing includes at least one of filtering, amplifying, providing digital-to-analog conversion, providing analog-to-digital conversion, sampling, and correcting for direct current (DC) offset. 
     
     
         4 . The method of  claim 1 , wherein the processing includes processing in at least one of a digital domain and an analog domain. 
     
     
         5 . The method of  claim 1 , wherein the processing includes configuring at least one of the baseband components for a first frequency response characteristic for the first baseband signal and configuring the at least one of the baseband components for a second frequency response characteristic for the second baseband signal. 
     
     
         6 . The method of  claim 5 , wherein the at least one of the baseband components include at least one of low-pass filters, finite-impulse response filters, and DC-offset correction elements. 
     
     
         7 . The method of  claim 1 , wherein the baseband components include at least one of low-pass filters, all-pass filters, variable-gain amplifiers, analog-to-digital converters, digital-to-analog converters, finite-impulse response filters, smoothing filters, decimator filters, and DC-offset correction elements. 
     
     
         8 . The method of  claim 1 , wherein the converting and processing are performed for a plurality of signals from a plurality of systems. 
     
     
         9 . The method of  claim 1 , wherein the processing includes sampling at a first sampling rate for the first baseband signal and a second sampling rate for the second baseband signal. 
     
     
         10 . The method of  claim 9 , wherein the sampling is performed by at least one of a decimator filter, a digital-to-analog converter, and an analog-to-digital converter. 
     
     
         11 . A multi-mode receiver system for processing signals based on a plurality of systems, comprising:
 a baseband section configured to process a first baseband signal based on a first system using baseband components, wherein the baseband section is further configured to process a second baseband signal based on a second system using the baseband components.   
     
     
         12 . The system of  claim 11 , further including a downconverter that is configured to convert a first signal to the first baseband signal and a second signal to the second baseband signal. 
     
     
         13 . The system of  claim 11 , further including a first downconverter and a second downconverter, the first downconverter configured to convert a first signal to the first baseband signal, the second downconverter configured to convert a second signal to the second baseband signal. 
     
     
         14 . The system of  claim 11 , wherein the first system and the second system each include at least one of the following systems code-division multiple access, personal-communication service, global-positioning satellite, digital-broadcast satellite, and global system for mobile communications. 
     
     
         15 . The system of  claim 11 , wherein the baseband components include at least one of low-pass filters, all-pass filters, variable-gain amplifiers, analog-to-digital converters, digital-to-analog converters, finite-impulse response filters, smoothing filters, decimator filters, and DC-offset correction elements. 
     
     
         16 . The system of  claim 11 , wherein at least one of the baseband components are configured for a first frequency response characteristic for the first baseband signal and configured for a second frequency response characteristic for the second baseband signal. 
     
     
         17 . The system of  claim 16 , wherein the at least one of the baseband components include at least one of low-pass filters, finite-impulse response filters, and DC-offset correction elements. 
     
     
         18 . The system of  claim 11 , wherein at least one of the baseband components is configured to sample at a first sampling rate for the first baseband signal and a second sampling rate for the second baseband signal. 
     
     
         19 . The system of  claim 18 , wherein the at least one of the baseband components includes at least one of a decimator filter, a digital-to-analog converter, and an analog-to-digital converter. 
     
     
         20 . The system of  claim 11 , wherein the baseband section is further configured to process a plurality of signals from a plurality of systems. 
     
     
         21 . A transceiver, comprising:
 means for transmitting signals;   means for receiving signals, wherein the means for receiving includes pre-converting processing means;   means for converting a first signal based on a first system to a first baseband signal;   means for converting a second signal based on a second system to a second baseband signal; and   means for processing the first baseband signal, wherein the means for processing the first baseband signal is used for processing the second baseband signal.   
     
     
         22 . The transceiver of  claim 21 , wherein the first system and the second system each include at least one of the following systems code-division multiple access, personal-communication service, global-positioning satellite, digital-broadcast satellite, and global system for mobile communications. 
     
     
         23 . The transceiver of  claim 21 , wherein the means for processing includes at least one of means for filtering, amplifying, providing digital-to-analog conversion, providing analog-to-digital conversion, sampling, and correcting for direct current (DC) offset. 
     
     
         24 . The transceiver of  claim 21 , wherein the means for processing includes means for processing in at least one of a digital domain and an analog domain. 
     
     
         25 . The transceiver of  claim 21 , wherein the means for processing includes means for providing a first frequency response characteristic for the first baseband signal and a second frequency response characteristic for the second baseband signal. 
     
     
         26 . The transceiver of  claim 21 , wherein the means for processing includes means for sampling at a first sampling rate for the first baseband signal and a second sampling rate for the second baseband signal. 
     
     
         27 . The transceiver of  claim 21 , wherein the means for transmitting, means for receiving, means for converting, and means for processing are performed for a plurality of signals from a plurality of systems. 
     
     
         28 . A multi-mode receiver system, comprising:
 a code-division multiple access system having a common baseband system; and   a digital-broadcast system that shares the common baseband system with the code-division multiple access system.   
     
     
         29 . The multi-mode receiver system of  claim 28 , wherein the common baseband system includes at least one of a low-pass filter, an all-pass filter, a direct current (DC)-correction element, and a variable-gain amplifier. 
     
     
         30 . The multi-mode receiver system of  claim 29 , wherein the low-pass filter and the DC-correction element are configured to include switchable bandwidths. 
     
     
         31 . The multi-mode receiver system of  claim 28 , wherein the common baseband system includes at least one of a low-pass filter, an analog-to-digital converter, a decimator filter, a digital-to-analog converter, a smoothing filter, a finite-impulse response filter, a direct current (DC)-correction element, and a variable-gain amplifier. 
     
     
         32 . The multi-mode receiver system of  claim 31 , wherein at least one of the analog-to-digital converter, the digital-to-analog converter, and the decimator filter is configured to have a first sampling rate for the code-division multiple access system and a second sampling rate for the digital-broadcast system. 
     
     
         33 . The multi-mode receiver system of  claim 31 , wherein at least one of the finite-impulse response filter, the DC-correction element, and the decimator filter is configured to operate at a first frequency response for the code-division multiple access system and a second frequency response for the digital-broadcast system.