By Dr. Ernest Simo
23.0 Let's look at an example of how the Long PN Code is used.
Let us assign the Long PN offsets LC(t-
A) and LC(t- B) to Mobile A and Mobile B respectively. The signal from Mobile A to cell A is of the form di(t)• LC(t- A). Likewise the signal from Mobile B to cell B is of the form dj(t)•LC(t- B).The received signal at cell A is the composite signal from Mobile A and Mobile B. (Both Mobiles are on the same 1.25 MHz Frequency band.). Likewise, the received signal at cell B is the same composite signal. This composite signal received by each cell can be represented as:
A) + dj(t)• LC(t- B)Here, we have ignored the propagation delay which can be readily resolved by the synchronization process at the cells.
© 2001 DR. ERNEST SIMO - SPACE2000