Use of adaptive antenna array in conjunction with an on-channel repeater to improve signal quality

A method to promote signal integrity in a digital repeater environment comprising:

• producing pilot energy measurements representative using available correlation metrics;
• measuring non-correlated energy values;
• calculating the residual leakage metric;
• determining the total transmitted power from the repeater;
• calculating a metric that is a function of one or more of the pilot energy measurements, non-correlated energy values, residual leakage metric, and output power of the repeater to generate a composite metric;
• and applying a steepest descent adaptive algorithm to modify the spatial weight settings to optimize the composite metric to improve feedback cancellation;
• further comprising producing a pilot energy measurement using one or more repeater values comprising a set of time series of one or more post cancellation receive frequency bins, time series of post cancellation receive signal associated with the desired carrier signal frequency channel;
• further comprising measuring the average interference as a correlation of one or more repeater values comprising a set of time series of one or more post cancellation receive frequency bins, time series of post cancellation receive signal associated with the desired carrier signal frequency channel and a cooperating wireless communication channel value to generate the average interference value, the average interference value described as the non-correlated energy of the wireless communication channel.

A non-transitory computer readable medium having stored thereon computer executable instructions for performing at least the following acts:

• producing pilot energy measurements;
• measuring non-correlated energy values;
• calculating the residual leakage metric;
• determining the sum of the mean squared averages of an array of signals;
• calculating a metric that is a function of one or more of the pilot energy measurements, non-correlated energy values, residual leakage metric, and output power of the repeater to generate a composite metric;
• and applying a steepest descent adaptive algorithm to modify the spatial weight settings to optimize the composite metric to improve feedback cancellation;
• further comprising producing a pilot energy measurement using one or more repeater values comprising a set of time series of one or more post cancellation receive frequency bins, time series of post cancellation receive signal associated with the desired carrier signal frequency channel;
• further comprising measuring the average interference as a correlation of one or more repeater values comprising a set of time series of one or more post cancellation receive frequency bins, time series of post cancellation receive signal associated with the desired carrier signal frequency channel and a cooperating wireless communication channel value to generate the average interference value, the average interference value described as the non-correlated energy of the wireless communication channel.

A processor, comprising a memory having stored thereon computer executable instructions to cause the processor to performing at least the following acts:

• producing pilot energy measurements representative using available correlation metrics;
• measuring non-correlated energy values;
• calculating the residual leakage metric;
• determining the sum of the mean squared averages of an array of signals;
• calculating a metric that is a function of one or more of the pilot energy measurements, non-correlated energy values, residual leakage metric, and output power of the repeater to generate a composite metric;
• and applying a steepest descent adaptive algorithm to modify the spatial weight settings to optimize the composite metric to improve feedback cancellation;
• further comprising producing a pilot energy measurement using one or more repeater values comprising a set of time series of one or more post cancellation receive frequency bins, time series of post cancellation receive signal associated with the desired carrier signal frequency channel;
• further comprising measuring the average interference as a correlation of one or more repeater values comprising a set of time series of one or more post cancellation receive frequency bins, time series of post cancellation receive signal associated with the desired carrier signal frequency channel and a cooperating wireless communication channel value to generate the average interference value, the average interference value described as the non-correlated energy of the wireless communication channel.

A system that facilitates feedback loop cancelation in a repeater environment comprising:

• means for receiving transmitter leakage signal and receive signal at M number of receivers;
• means for performing an FFT on M zero appended receive block from M receivers to produce M sets of frequency bins;
• means for applying M complex spatial weight arrays respectively to the M number of sets of frequency bins;
• means for combining the weighted frequency bins into a composite signal;
• means for producing a post cancellation receive frequency bin;
• means for applying an inverse FFT on N weighted transmit frequency bin arrays to produce N time domain series;
• means for transmitting N number of transmit time domain series;
• and means for receiving N number of repeater transmit signals at M number of receivers to form M number repeater transmit leakage signals summed with M number of received signals;
• further comprising producing a pilot energy measurement using one or more repeater values comprising a set of time series of one or more post cancellation receive frequency bins, time series of post cancellation receive signal associated with the desired carrier signal frequency channel;
• further comprising measuring the average interference as a correlation of one or more repeater values comprising a set of time series of one or more post cancellation receive frequency bins, time series of post cancellation receive signal associated with the desired carrier signal frequency channel and a cooperating wireless communication channel value to generate the average interference value, the average interference value described as the non-correlated energy of the wireless communication channel.

A method for facilitating feedback loop cancelation in a repeater environment comprising:

• receiving transmitter leakage signal and receive signal at M number of receivers;
• performing an FFT on M zero appended receive block from M receivers to produce M sets of frequency bins;
• applying M complex spatial weight arrays respectively to the M number of sets of frequency bins;
• combining the weighted frequency bins into a composite signal;
• producing a post cancellation receive frequency bin;
• applying an inverse FFT on N weighted transmit frequency bin arrays to produce N time domain series;
• transmitting N number of transmit time domain series;
• and receiving N number of repeater transmit signals at M number of receivers to form M number repeater transmit leakage signals summed with M number of received signals;
• further comprising producing a pilot energy measurement using one or more repeater values comprising a set of time series of one or more post cancellation receive frequency bins, time series of post cancellation receive signal associated with the desired carrier signal frequency channel;
• further comprising measuring the average interference as a correlation of one or more repeater values comprising a set of time series of one or more post cancellation receive frequency bins, time series of post cancellation receive signal associated with the desired carrier signal frequency channel and a cooperating wireless communication channel value to generate the average interference value, the average interference value described as the non-correlated energy of the wireless communication channel.