  Spatially coupled serially concatenated codes (SC-SCCs) are a class of
spatially coupled turbo-like codes, which have a close-to-capacity performance
and low error floor. In this paper we investigate the impact of coupling
memory, block length, decoding window size, and number of iterations on the
performance, complexity, and latency of SC-SCCs. Several design tradeoffs are
presented to see the relation between these parameters in a wide range. Also,
our analysis provides design guidelines for SC-SCCs in different scenarios to
make the code design independent of block length. As a result, block length and
coupling memory can be exchanged flexibly without changing the latency and
complexity. Also, we observe that the performance of SC-SCCs is improved with
respect to the uncoupled ensembles for a fixed latency and complexity.
