Integrated adaptive spatial-temporal system for controlling narrowband and wideband sources of interferences in spread spectrum CDMA receivers

System for controlling narrowband and wideband sources of interference, the system comprising:

• a spatial filter responsive to an antenna array for nulling interference signals received with a spread spectrum signal;
• a narrowband filter with an input responsive to the spectrum signal and an output for transmitting the filtered spread spectrum signal, the narrowband filter for filtering any remaining narrowband interference signals from the spread;
• and
• means for analyzing the output of the narrow band filter and in response adjusting the spatial filter.

A system for controlling narrowband and wideband sources of interference, the system comprising:

• a spatial filter responsive to an antenna for nulling interference signals received with a spread spectrum signal;
• a narrow band filter with an input responsive to the spatial filter for filtering any remaining narrowband interference signals from the spread spectrum signal and an output for transmitting the filtered spread spectrum signal;
• and
• a feedback subsystem having an input connected to the output of the narrow band filter and an output connected to the spatial filter.

A method for controlling narrowband and wideband sources of interference, the method comprising:

• nulling interference signals received with a spread spectrum signal in a spatial filter;
• filtering any remaining narrow band interference signals in an adaptive narrow band filter and transmitting the filtered spread spectrum signal;
• and
• analyzing the output of the narrow band filter and in response adjusting the spatial filter.

A method for controlling narrow band and wide band sources of interference, the method comprising:

• using an N element antenna array to receive a spread spectrum signal and interference signals, each element receiving a different phase shifted version of the spread spectrum and interference signal;
• combining the phase shifted spread spectrum and interference signals in a spatial filter according to controlling weights to null N-1 of the interference signals;
• filtering any remaining narrowband interference signals in the combined signal in an adaptive narrow band filter;
• and
• adjusting the controlling weights until the operation of the spatial filter is optimized and nulls wideband interference signals before narrowband interference signals.

An integrated adaptive spatial-temporal system for controlling narrowband and wideband sources of interference, the system comprising:

• an N element antenna array which receives a spread spectrum signal and interference signals, each element receiving a different phase shifted version of the spread spectrum and interference signals;
• a spatial filter including an antenna pattern former responsive to the antenna array which combines the phase shifted spread spectrum and interference signals according to controlling weights to null N-1 of the interference signals;
• an adaptive narrow band filter responsive to the spatial filter for filtering any remaining narrowband interference signals from the combined signal;
• and
• a feedback subsystem responsive to the narrow band filter for adjusting the controlling weights of the antenna pattern former until the operation of the spatial filter is optimized and nulls wideband interference signals before narrowband interference signals, the feedback system including a processor programmed to calculate the signal-to-interference-plus-noise-ratio (SINR) at the output of the narrowband filter and to adjust the controlling weights of the antenna pattern former until the SINR is maximized.