Timing differences between UEs and the eNB. In this simulation,
initially, 175 UEs randomly distributed over a 1 km2 area have a timing
offset to the eNB. The timing offset is uniformly distributed over
[–5, 5] ms. Transmission power of the D2D synchronization signals is
23 dBm. If the signal to interference and noise power of the received D2D
synchronization signals exceeds 0 dB, the D2D synchronization signals can
be successfully detected.