6.5 Spread signal of data symbols and data blocks
25.2233GPPRelease 17Spreading and modulation (TDD)TS
The combination of the user specific channelisation and cell specific scrambling codes can be seen as a user and cell specific spreading code 
with
, k=1,…,KCode, p=1,…,NkQk.
With the root raised cosine chip impulse filter Cr0(t) the transmitted signal belonging to the data block 
of equation 1 transmitted before the midamble is
(6)
and for the data block 
of equation 1 transmitted after the midamble
(7)
where Lm is the number of midamble chips.