To provide a CDMA MODEM for transmitting/receiving a communication signal including an information signal and a connection control signal through a transmission channel and a reception channel respectively including first and second pilot code signals synchronously with each other.
The CDMA MODEM includes a MODEM transmitter having: a code generator; a spreading circuit; and a global pilot code generator. The CDMA MODEM also includes a MODEM receiver having a pilot code generator and a group of associated pilot code correlators. The code phase of the associated pilot signal is changed responsive to an acquisition signal value until a pilot signal is received. The associated pilot code tracking logic adjusts the associated pilot code signal in phase responsive to the acquisition signal so that the signal power level of the despread associated pilot code signal is maximized.
| JPWO2008142735 | Methods and devices for generating binary pseudo-random data |
| WO/2001/056172 | PN GENERATORS FOR SPREAD SPECTRUM COMMUNICATIONS SYSTEMS |
| JPH04115616 | RANDOM CODE GENERATING DEVICE |
OZLUTURK FATIH
SILVERBERG AVI
| JP2009225484A | 2009-10-01 | |||
| JPH05327580A | 1993-12-10 | |||
| JPH0242500A | 1990-02-13 | |||
| JPS6323425A | 1988-01-30 |
| WO1993021707A1 | 1993-10-28 |
Kazuo Abe