Method and Apparatus For Enhanced Performance and Crosstalk Measurement in a MIMO Communication System
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Abstract
The present invention comprises a system and method for reduction of the influence of crosstalk, increase in and control over quality of service, increase in stability and reduction of power use in a system having multiple transmission lines. A novel crosstalk measurement method is introduced. Knowing the crosstalk, various algorithms may be employed, for example to reduce or eliminate its effects in order to guarantee a bit error rate equal to or less than the maximum allowed for each line. Similar methods are provided to minimize power consumption, or maximize related measures of line performance. Systems, devices, methods and techniques are provided that allow communication system to adapt transmission power margin, power spectral densities, and the like dynamically to changing subscriber'"'"'s application needs in MIMO systems.
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Citations
40 Claims
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1-21. -21. (canceled)
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22. A method of crosstalk reduction in a multiple input-multiple output (MIMO) packet of transmission lines comprising steps of:
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a. collecting service data for each transmission line in said transmission line system; b. collecting operational data for said transmission line; c. defining a target value by using a method chosen from the group consisting of i. defining a vector of target parameter values for each said transmission line based on service; and
,ii. determining for each line a maximum allowed bit error rate (BER) required to maintain adequate quality of service (QoS) on said line; d. calculating a metric based on the difference between said target value and the actual parameter value for each said transmission line; e. determining the crosstalk for each pair of said transmission lines; and f. varying the transmitted power spectral density (PSD) at each frequency of each said transmission line to optimize said metric; whereby said metric for said MIMO transmission line system is optimized taking into account said application data and said crosstalk. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A system for reducing crosstalk in a MIMO transmission line system comprising:
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a. means for collecting application data for each transmission line in said transmission line system; b. means for collecting operational data for said transmission line; c. crosstalk measurement means for determining the crosstalk for each pair of said transmission lines; d. means for calculating a metric function of said application data, said operational data, and said crosstalk; e. power control means for adjusting the transmit PSD for said transmission lines to maximize said metric function; wherein application data is utilized in addition to operational and crosstalk data to maximize said metric function. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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Specification