Configurable all-digital coherent demodulator system for spread spectrum applications

A configurable digital coherent demodulator system for demodulating a digital signal, the digital coherent configurable demodulator system comprising:

• a configurable traffic channel demodulator configured by a received first configuration parameter to demodulate a baseline channel into a traffic channel signal;
• and
• a configurable correction device coupled to the configurable traffic channel demodulator, configured by a received second configuration parameter, and having a complex multiplier configured to multiply the traffic channel signal with a feed forward phase error correction signal;
• and
• a configurable parameter estimator coupled to the configurable traffic channel demodulator and the configurable correction device, the configurable parameter estimator configured by a received third configuration parameter to provide an error estimate of a pilot channel,
• wherein the configurable parameter estimator has a configurable comparator circuit configured to receive the third configuration parameter, which is a configurable accumulator length that establishes a number of sum operations before a dump operation is performed.

A method of demodulating a digital signal using a configurable digital coherent demodulator system, the method comprising:

• a) receiving a baseline digital signal at a configurable traffic channel demodulator, which is configured by a received first configuration parameter;
• b) demodulating the baseline digital signal with a traffic code to obtain a traffic channel signal;
• c) receiving a feed forward phase error correction signal at a configurable correction device, which is configured by a received second configuration parameter;
• d) multiplying the traffic channel signal by the feed forward phase error correction signal;
• and
• e) receiving the first configuration parameter at the configurable traffic channel demodulator, wherein the received first configuration parameter is an observation length that establishes a number of sum operations required before a dump operation is performed during a sum and dump operation on samples of the baseline digital signal.

A method of demodulating a digital signal using a configurable digital coherent demodulator system, the method comprising:

• a) receiving a baseline digital signal at a configurable traffic channel demodulator, which is configured by a received first configuration parameter;
• b) demodulating the baseline digital signal with a traffic code to obtain a traffic channel signal;
• c) receiving a feed forward phase error correction signal at a configurable correction device, which is configured by a received second configuration parameter;
• d) multiplying the traffic channel signal by the feed forward phase error correction signal;
• e) receiving a complex channel signal at a configurable extended code/long code demodulator;
• and
• f) demodulating an extended code and a long code modulated signal from the complex channel signal using the configurable extended code/long code demodulator to form the baseline digital signal.

A method of demodulating a digital signal using a configurable digital coherent demodulator system, the method comprising:

• a) receiving a baseline digital signal at a configurable traffic channel demodulator, which is configured by a received first configuration parameter;
• b) demodulating the baseline digital signal with a traffic code to obtain a traffic channel signal;
• c) receiving a feed forward phase error correction signal at a configurable correction device, which is configured by a received second configuration parameter;
• d) multiplying the traffic channel signal by the feed forward phase error correction signal;
• e) estimating the feed forward phase error correction signal using a configurable parameter estimator, which is configured by a received third configuration parameter;
• and
• f) receiving the third configuration parameter at the configurable parameter estimator, wherein the received third configuration parameter is a configurable accumulator length which establishes a number of sum operations before a dump operation is performed.

A configurable digital coherent demodulator system for demodulating a digital signal, the digital coherent configurable demodulator system comprising:

• a configurable traffic channel demodulator configured by a received first configuration parameter to demodulate a baseline channel into a traffic channel signal;
• a configurable correction device coupled to the configurable traffic channel demodulator, configured by a received second configuration parameter, and having a complex multiplier configured to multiply the traffic channel signal with a feed forward phase error correction signal;
• and
• a configurable extended and long code demodulator coupled to the configurable traffic channel demodulator,
• wherein the configurable extended and long code demodulator is configured to receive a fourth configuration parameter, which is an observation length for configuring the configurable extended and long code demodulator.

A method of demodulating a digital signal using a configurable digital coherent demodulator system, the method comprising:

• a) receiving a baseline digital signal at a configurable parameter estimator, which is configured by a received first configuration parameter;
• b) estimating a feed forward phase error correction signal using the configurable parameter estimator;
• and
• c) receiving the feed forward phase error correction signal at a configurable correction device, which is configured by a received second configuration parameter;
• d) multiplying a traffic channel signal by the feed forward phase error correction signal by the configurable correction device;
• and
• e) receiving the first configuration parameter at the configurable parameter estimator, wherein the received first configuration parameter is a configurable accumulator length that establishes a number of sum operations before a dump operation is performed.