Automatic gain control and baseband preintegration to reduce computation requirements at lower data rates
A method for processing baseband signals according to one embodiment includes receiving I and Q baseband signals; and selectively reducing an amount of samples of the baseband signals to be processed in a correlator, wherein the reduction rate is based on a data rate of the baseband signals. A preintegrator module according to one embodiment includes an automatic gain control section for performing automatic gain control on I and Q baseband signals; a first preintegrator coupled to an output of the automatic gain control section, the first preintegrator being for selectively reducing an amount of samples in the I baseband signal based on a data rate of the I baseband signal; and a second preintegrator coupled to an output of the automatic gain control section, the second preintegrator being for selectively reducing an amount of samples in the Q baseband signal based on a data rate of the Q baseband signal. Additional systems and methods are also presented.
1. A method for processing baseband signals, the method comprising:
receiving, by a preintegrator, inphase (I) and quadrature (Q) baseband signals; and
selectively reducing an amount of samples of the baseband signals to be processed in a correlator, wherein reducing the amount of samples is based on a data rate of the baseband signals.
2. The method of claim 1 , wherein an automatic gain control is performed prior to reducing the amount of samples to reduce a number of bits processed in the reducing step.
3. The method of claim 1 , wherein the amount of samples is not reduced until a data rate of the baseband signals falls below a threshold.
4. The method of claim 1 , wherein the amount of samples is reduced by preintegrating input samples by adding a selectable number of the input samples together.
5. A system, comprising:
a preintegrator configured to receive inphase (I) and quadrature (Q) baseband signals, wherein the preintegrator selectively reducing an amount of samples of the baseband signals to be processed in a correlator and wherein reducing the amount of samples is based on a data rate of the received baseband signals.
6. The system of claim 5 , wherein an automatic gain control is performed prior to reducing the amount of samples to reduce a number of bits processed by the preintegrator.
7. The system of claim 5 , wherein the amount of samples is not reduced until a data rate of the baseband signals falls below a threshold.
8. The system of claim 5 , wherein the selectively reducing the amount of the samples of the baseband signals is configured to reduce the amount of samples by preintegrating input samples by adding a selectable number of the input samples together.
9. The system of claim 5 , further comprising at least one antenna for receiving a radio frequency signal from which the baseband signals are derived.
10. A preintegrator module, comprising:
an automatic gain control section for performing automatic gain control on inphase (I) and quadrature (Q) baseband signals;
a first preintegrator coupled to an output of the automatic gain control section, the first preintegrator being for selectively reducing an amount of samples in the I baseband signal based on a data rate of the I baseband signal; and
a second preintegrator coupled to an output of the automatic gain control section, the second preintegrator being for selectively reducing an amount of samples in the Q baseband signal based on a data rate of the Q baseband signal.
11. The system of claim 10 , wherein the amount of samples is not reduced until a data rate of at least one of the baseband signals falls below a threshold.
12. The system of claim 10 , wherein the preintegrators each include an adder for adding a selectable number of samples together.
13. The system of claim 10 , further comprising at least one antenna for receiving a radio frequency signal from which the baseband signals are derived.