UEspecific settings, specified as a structure. ue
contains
the following fields.
Parameter Field  Required or Optional  Values  Description 
NULRB  Required  Positive scalar integer  Number of uplink (UL) resource blocks (RBs). 
CyclicPrefixUL  Optional  'Normal' (default), 'Extended'
 Cyclic prefix length 
Windowing  Optional  Nonnegative scalar integer Default
value is absent.  The number of timedomain samples over which windowing and overlapping
of SCFDMA symbols is applied See Note 
Note:
If ue.Windowing is absent, info.Windowing will
return a default value chosen as a function of ue.NULRB to
compromise between the effective duration of cyclic prefix (and therefore
the channel delay spread tolerance) and the spectral characteristics
of the transmitted signal (not considering any additional FIR filtering). ue.Windowing must
be even. With a value of zero, the issues above concerning concatenation
of subframes before SCFDMA modulation do not apply. The number of samples used for windowing depends on the cyclic
prefix length (normal or extended) and the number of resource blocks,
and is chosen in accordance with the maximum values implied in TS
36.104, Tables E.5.11 and E.5.12 [1]. The number of windowing samples is a compromise
between the effective duration of cyclic prefix (and therefore the
channel delay spread tolerance) and the spectral characteristics of
the transmitted signal (not considering any additional FIR filtering).
For a larger amount of windowing, the effective duration of the cyclic
prefix is reduced but the transmitted signal spectrum will have smaller
out of band emissions. Number of resource blocks NULRB  Windowing samples for normal cyclic prefix  Windowing samples for extended cyclic prefix 
6  4  4 
15  6  6 
25  4  4 
50  6  6 
75  8  8 
100  8  8 

Data Types: struct
Resource grid, specified as an MbyNbyP numeric
array array. The grid input contains M number of
subcarriers, N number of SCFDMA symbols, and P number
of transmission antennas. The array contains resource elements (REs)
for a number of subframes across all configured antenna ports, as
described in Data Structures.
Alternatively, it contains multiple such matrices concatenated to
give multiple subframes (concatenation across the columns or 2nd dimension).
The antenna planes in grid
are each OFDM modulated
to give the columns of waveform
.
Dimension M must be 12 ×NULRB
where NULRB
must
be (6...110
). Dimension N must
be a multiple number of symbols in a subframe L,
where L=14 for normal cyclic prefix and L=12
for extended cyclic prefix. Dimension P must be
(1,2,4
).
Note that grid
can span multiple subframes
and windowing and overlapping is applied between all adjacent SCFDMA
symbols, including the last of one subframe and the first of the next.
Therefore a different result is obtained than if lteSCFDMAModulate
is
called on individual subframes and then those timedomain waveforms
concatenated. The resulting waveform in that case would have discontinuities
at the start/end of each subframe. Therefore it is recommended that
all subframes for SCFDMA modulation first be concatenated prior to
calling lteSCFDMAModulate
on the resulting multisubframe
array. However, individual subframes can be OFDM modulated and the
resulting multisubframe timedomain waveform created by manually
overlapping.
Data Types: double
Complex Number Support: Yes
Number of windowed and overlapped samples, specified as a positive
scalar integer. This argument controls the number of windowed and
overlapped samples used in timedomain windowing. If present it is
used for the SCFMDA modulation (instead of ue
.Windowing
)
and it is the value output for info
.Windowing
.
Data Types: double