P-SS (LTE)
P-SS Primary Synchronization Signal is the Primary Synchronization signal for an LTE Long Term Evolution downlink frame. The center 72 subcarriers (6 RB Resource Block wide) are allocated to P-SS, but only the center 62 subcarriers are used. The unused subcarriers (the outer five on each side) are set to zero power during P-SS transmission. P-SS is not present in an uplink frame.
For FDD Frequency Division Duplex: A duplex scheme in which uplink and downlink transmissions use different frequencies but are typically simultaneous. frame type 1, P-SS is present in the last symbol of slots 0 and 11 in every frame.
For TDD Time Division Duplex: A duplexing technique dividing a radio channel in time to allow downlink operation during part of the frame period and uplink operation in the remainder of the frame period. frame type 2, P-SS is present in the third symbol in slots 2 and 12 in every frame.
See Downlink Control Channel Properties for information on setting P-SS .
P-SS is transmitted as a Zadoff-Chu sequence and thus appears as irregularly spaced points on a circle in the IQ Meas constellation diagram.
P-SS and S-SS Secondary Synchronization Signal can be transmitted on a single C-RS Cell-specific RS antenna port or all of them.
See Also
