certainty and near-far impacts, e.g. the following events correspond to the RACH procedures in the terminal: (1) identifying and eventual selection of available RACH sub-channels with scrambling codes and sig- natures through BCH decoding; (2) measurement of DL power level and setting of ini- tial RACH power level; (3) sending of 1 ms RACH preamble with chosen signature; (4) AICH decoding to verify preamble detection10 by the BS; (5) transmitting11 10 or 20 ms RACH message part at the AICH detection. CPCH. The CPCH follows basically the same events as the RACH, differing only on L1 collision detection (see [11]). Applying fast power control on the CPCH we mini- mize interference due to the data transmission. Cell search. The cell search procedure employing the synchronization channel uses different scrambling codes with different phase shifts of the code. The events include: (A) searching 256 chips primary synchronization code; 12 since the latter is the same in every slot, the peak detected corresponds to the slot boundary; (B) on the peak detection of the primary synchronization code, the MS will look at the largest peak from the sec- ondary SCH code word, i.e. from among the 64 options; (C) at the detection of the sec- ondary SCH code word the frame timing is known. CONFIGURATION OF TDD PHYSICAL CHANNELS TDD physical channels illustrated in Figure 4.40 have three-layer structure with respect to time slots (TS), radio frames and system frame numbering (SFN). The radio frame configurations or time slots vary according to the resource allocation. All physical channels use guard symbols in every time slot. The latter serve as the TDMA compo- nent to separate different user signals in time and code domains. A TDD physical channel is burst (i.e. a combination of a data part, a midamble and a guard period), transmitted in a particular time slot within allocated radio frames. A burst lasts one time slot and its allocation can be either continuous (i.e. in every frame), or discontinuous (i.e. only one in a subset of ra