Receiver for receiving data symbols having a symbol period
First Claim
1. A receiver for receiving data symbols having a symbol period with duration SP, wherein SP is the symbol period duration, comprising:
- N input terminals for retrieving N antenna signals, wherein in N≧
2;
a multiplexer having N inputs coupled to the N input terminals respectively, for selecting the N antenna signals one by one under control of a control signal so as to obtain a combined antenna signal;
a processing unit for performing an autocorrelation function on the combined antenna signal so as to obtain a combined signal;
a demultiplexer for splitting in dependence of the control signal the combined signal into N signals corresponding to the N antenna signals;
N first integrator units for integrating the N signals so as to obtain N integration signals;
a control signal generator for generating the control signal wherein the control signal generator is arranged to generate in a first mode a control signal which enables the multiplexer to select equally in time over a symbol period the N antenna signals and wherein at least one of the N antenna signals is selected more than one time in a symbol period, and wherein the control signal generator is arranged to generate in a second mode in dependence of the N integration signals a control signal which enables the multiplexer to select only one of the N antenna signals.
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Abstract
A receiver and method for receiving symbols having a symbol period with duration SP comprising. N antenna signals are selected equally in time over a symbol period to obtain a combined antenna signal. An autocorrelation is performed on the combined antenna signal to obtain a combined signal. The combined signal is split into the corresponding antenna signal parts and subjected to an integration function. The output of the integration function is used the select the antenna signal with the best signal quality. The invention enables to perform an efficient antenna diversity circuit, which can partially be used for simultaneously preamble detection and frequency offset estimation.
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Citations
8 Claims
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1. A receiver for receiving data symbols having a symbol period with duration SP, wherein SP is the symbol period duration, comprising:
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N input terminals for retrieving N antenna signals, wherein in N≧
2;a multiplexer having N inputs coupled to the N input terminals respectively, for selecting the N antenna signals one by one under control of a control signal so as to obtain a combined antenna signal; a processing unit for performing an autocorrelation function on the combined antenna signal so as to obtain a combined signal; a demultiplexer for splitting in dependence of the control signal the combined signal into N signals corresponding to the N antenna signals; N first integrator units for integrating the N signals so as to obtain N integration signals; a control signal generator for generating the control signal wherein the control signal generator is arranged to generate in a first mode a control signal which enables the multiplexer to select equally in time over a symbol period the N antenna signals and wherein at least one of the N antenna signals is selected more than one time in a symbol period, and wherein the control signal generator is arranged to generate in a second mode in dependence of the N integration signals a control signal which enables the multiplexer to select only one of the N antenna signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification