Modal adaptive antenna using reference signal LTE protocol
One or more input signals are used to generate a Pseudo noise generator and re-inject the signal to obtain a more efficient method of control of a receiver using adaptive antenna array technology. The antenna array automatically adjusts its direction to the optimum using information obtained from the input signal by the receiving antenna elements. The input signals may be stored in memory for retrieval, comparison and then used to optimize reception. The difference between the outputs of the memorized signals and the reference signal is used as an error signal. One or multiple Modal antennas, where the Modal antenna is capable of generating several unique radiation patterns, can implement this optimization technique in a MIMO configuration.
1. A multi-input multi-output (MIMO) antenna processing system, comprising:
a first automatic tuning module configured to communicate first voltage signals to active components associated with a first modal antenna;
a second automatic tuning module configured to communicate second voltage signals to active components associated with a second modal antenna;
each of the first and second automatic tuning modules being coupled to an adaptive processor, and each of the first and second automatic tuning modules being further coupled to a lookup table;
the adaptive processor further coupled to each of a first circuit block and a second circuit block;
the first circuit block coupled to a first comparator and first counter, the first comparator configured to receive inputs from the first circuit block and compare with a reference voltage communicated to the first comparator from the adaptive processor, the first counter is configured to receive a first comparator output signal from the first comparator, and a first counter output of the first counter is configured for communication with the first automatic tuning module and the lookup table associated; and
the second circuit block coupled to a second comparator and second counter, the second comparator configured to receive inputs from the second circuit block and compare with a reference voltage communicated to the second comparator from the adaptive processor, the second counter is configured to receive a second comparator output signal from the second comparator, and a second counter output of the second counter is configured for communication with the second automatic tuning module and the lookup table associated;
wherein the first voltage signals associated with the first automatic tuning module are determined from the lookup table based on a combination of the first counter output signal, a first output signal associated with the adaptive processor, and a first bi-directional signal associated with the first automatic tuning module; and
wherein the second voltage signals associated with the second automatic tuning module are determined from the lookup table based on a combination of the second counter output signal, a second output signal associated with the adaptive processor, and a second bi-directional signal associated with the second automatic tuning module.
2. The MIMO antenna processing system of claim 1 , wherein
an error signal output from the adaptive processor is stored in memory for retrieval and comparison to optimize antenna modes associated with the first and second circuit blocks.
3. The MIMO antenna processing system of claim 1 ,
further comprising a first modal antenna coupled to the first circuit block, wherein the first modal antenna is configured to generate two or more first radiation modes, wherein the system is configured to use one of the first radiation modes for providing a first reference signal for use by the adaptive processor to optimize the antenna coupled to the first circuit block.
4. The MIMO antenna processing system of claim 3 ,
further comprising a second modal antenna coupled to the second circuit block, wherein the second modal antenna is configured to generate two or more second radiation modes, wherein the system is configured to use one of the second radiation modes for providing a second reference signal for use by the adaptive processor to optimize the antenna coupled to the second circuit block.
5. The MIMO antenna processing system of claim 4 , wherein
the first reference signal generated from the first modal antenna coupled to the first circuit block is used by the adaptive processor to optimize the second modal antenna coupled to the second circuit block.
6. The MIMO antenna processing system of claim 1 , wherein
the first automatic tuning module is coupled to a first lookup table, and the second automatic tuning module is coupled to a second lookup table.