CDMA system having time-distributed transmission paths for multipath reception

In a communications system providing wireless communications services to a plurality of subscriber stations in an urban serving area, the communications system comprising at least one base station and a plurality of antennas spatially distributed around said urban serving area, a method for providing spread spectrum-processed information signals to said urban serving area comprising the steps of:

• outputting a spread spectrum-processed information signal from said at least one base station;
• successively supplying said spread spectrum-processed information signal to said antennas at corresponding delay intervals greater than said chip interval and less than a search interval of said subscriber stations;
• and
• transmitting the successively delayed spread spectrum-processed information signals from the respective antennas into the urban serving area to form overlapping coverage regions that minimize shadowing effects.

A communications system providing code division multiple access (CDMA) wireless services to a plurality of subscriber stations in an urban serving area, comprising:

• a system clock source;
• at least one base station outputting CDMA modulated information on a forward channel;
• a plurality of antennas transmitting said CDMA modulated information distributed around said urban serving areas to minimize shadowing effects;
• and
• means for supplying said CDMA modulated information to said antennas at successive delay intervals sufficient to minimize multipath fading between the transmitted CDMA modulated information;
• wherein said system comprises a plurality of said base stations performing CDMA processing using identical code sequences, said supplying means comprising a series of delay devices receiving said system clock from said system clock source, each of said delay devices outputting a delayed system clock to a corresponding one of said base stations at a unique synchronization delay interval.

A communications system providing code division multiple access (CDMA) wireless services to a plurality of subscriber stations in an urban serving area, comprising:

• a system clock source;
• at least one base station outputting CDMA modulated information on a forward channel;
• a plurality of antennas transmitting said CDMA modulated information distributed around said urban serving areas to minimize shadowing effects;
• and
• means for supplying said CDMA modulated information to said antennas at successive delay intervals sufficient to minimize multipath fading between the transmitted CDMA modulated information;
• wherein said supplying means comprises a series of delay devices receiving said CDMA modulated information from said at least one base station, each of said delay devices outputting delayed CDMA modulated information to a corresponding one of said antennas at a unique synchronization delay interval.

A communications system providing code division multiple access (CDMA) wireless services to a plurality of subscriber stations in an urban serving area, comprising:

• a system clock source;
• at least one base station outputting CDMA modulated information on a forward channel;
• a plurality of antennas transmitting said CDMA modulated information distributed around said urban serving areas to minimize shadowing effects;
• and
• means for supplying said CDMA modulated information to said antennas at successive delay intervals sufficient to minimize multipath fading between the transmitted CDMA modulated information, wherein each of said delay intervals is within a range greater than one microsecond and less than forty microseconds;
• and
• wherein each of said delay intervals is substantially equal to ten microseconds.

In a communications system providing wireless communications services to a plurality of subscriber stations in an urban serving area, the communications system comprising at least one base station outputting a spread spectrum signal generated in response to a subscriber information signal and an assigned code sequence having a predetermined chip interval, and a plurality of antennas spatially distributed around said urban serving area, a method for providing spread spectrum-processed information signals to said urban serving area comprising the steps of:

• supplying the subscriber information signal to the at least one base station;
• supplying a synchronization signal to said at least one base station, said synchronization signal corresponding to a system clock;
• providing to said antennas corresponding spread spectrum signals from said at least one base station, each of said spread spectrum signals received by said corresponding antenna having a corresponding transmission delay relative to the other spread spectrum signals, said corresponding transmission delay being greater than said chip interval and less than a base station sequence offset of said at least one base station;
• and
• transmitting the spread spectrum signals from the respective antennas into the urban serving area to form overlapping coverage regions that minimize shadowing effects.

In a communications system providing wireless communications services to a plurality of subscriber stations in an urban serving area, the communications system comprising at least one base station and a plurality of antennas spatially distributed around said urban serving area, a method for providing spread spectrum-processed information signals to said urban serving area comprising the steps of:

• outputting a spread spectrum-processed information signal from said at least one base station;
• successively supplying said spread spectrum-processed information signal to said antennas at corresponding delay intervals greater than said chip interval and less than a base station sequence offset of said at least one base station;
• and
• transmitting the spread spectrum signals from the respective antennas into the urban serving area to form overlapping coverage regions that minimize shadowing effects.