Co-sequence interference detection and treatment
First Claim
1. A method in a communication system, comprising the steps of:
- receiving a signal comprising a first training signal section including a training sequence and a second payload data signal section;
evaluating at least a part of the first training signal section for determining a first value of a signal property measure of the first training signal section;
evaluating at least a part of the second payload data signal section for determining a second value for the signal property measure of the second payload data signal section;
comparing the first and second values to determine a difference; and
detecting an existence of co-sequence interference in the signal if an absolute value of the difference exceeds a predetermined threshold value.
6 Assignments
0 Petitions
Accused Products
Abstract
Signal properties of a signal section (106) comprising a training sequence are compared with corresponding signal properties of other signal sections (108, 110). At a too large discrepancy, co-sequence interference is concluded to be present. The used signal property can preferably be a signal-to-noise ratio measure or a signal statistics measure. If the existence of co-sequence interference (102) is concluded, measures can be taken to avoid such interference and to mitigate the effects of the interference. A method for mitigating effects of co-sequence interference in channel estimation comprises a joint detection and estimation procedure performed under constrictions assuming presence of co-sequence interference.
6 Citations
25 Claims
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1. A method in a communication system, comprising the steps of:
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receiving a signal comprising a first training signal section including a training sequence and a second payload data signal section; evaluating at least a part of the first training signal section for determining a first value of a signal property measure of the first training signal section; evaluating at least a part of the second payload data signal section for determining a second value for the signal property measure of the second payload data signal section; comparing the first and second values to determine a difference; and detecting an existence of co-sequence interference in the signal if an absolute value of the difference exceeds a predetermined threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method in a communication system, comprising the steps of:
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receiving a signal comprising a first signal section involving a training sequence and a second signal section; evaluating at least a part of the first signal section for determining a first value of a signal property measure of the first signal section; evaluating at least a part of the second signal section for determining a second value for the signal property measure of the second signal section; and detecting an existence of co-sequence interference in the signal based on a comparison between the first and second values, wherein existence of co-sequence interference is detected if a ratio between an absolute value of a difference between the first and second values, and the first value, is larger than a predetermined third value.
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20. A method in a communication system, comprising the steps of:
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receiving a signal comprising a first signal section involving a training sequence and a second signal section; evaluating at least a part of the first signal section for determining a first value of a signal property measure of the first signal section; evaluating at least a part of the second signal section for determining a second value for the signal property measure of the second signal section; detecting an existence of co-sequence interference in the signal based on a comparison between the first and second values; and determining a signal power ratio between true signal and co-sequence interference for the signal in the first signal section, and compensating apparent signal power of the first signal section using the determined signal power ratio to mitigate effects of co-sequence interference in the signal.
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21. A receiver device, comprising:
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a receiver configured to receive a signal including a first training signal section involving a training sequence and a second payload data signal section; a signal processor configured to evaluate; evaluate at least a part of the first training signal section for determining a first value of a signal property measure of the first training signal section; evaluate at least a part of the second payload data signal section for determining a second value for the signal property measure of the second payload data signal section; compare the first and second values to determine a difference; and detect an existence of co-sequence interference in the signal if an absolute value of the difference exceeds a predetermined threshold value. - View Dependent Claims (22, 23)
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24. A mobile terminal comprising a receiver device, said receiver device comprising:
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a receiver configured to receive a signal comprising a first training signal section involving a training sequence and a second payload data signal section; a signal processor configured to; evaluate at least a part of the first training signal section for determining a first value of a signal property measure of the first training signal section; evaluate at least a part of the second payload data signal section for determining a second value for the signal property measure of the second payload data signal section; compare the first and second values to determine a difference; and detect an existence of co-sequence interference in the signal if an absolute value of the difference exceeds a predetermined threshold value.
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25. A base station in a mobile communications system comprising a receiver device, said receiver device comprising:
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receiver means for a signal comprising a first training signal section involving a training sequence, and a second payload data signal section; means for evaluating at least a part of the first training signal section for determining a first value of a signal property measure of the first training signal section; means for evaluating at least a part of the second payload data signal section for determining a second value for the signal property measure of the second payload data signal section; means for comparing the first and second values to determine a difference; and means for detecting an existence of co-sequence interference in the signal if an absolute value of the difference exceeds a predetermined threshold value.
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Specification