Before

symbol sequence demodulation, the modulation parameters and channel response of each signal component should be estimated.

The consecutive N samples of [g.sub.s](n) constitute an OFDM symbol and according to (1) the samples during the kth OFDM symbol may be obtained by an N point IFFT (inverse fast Fourier transform) of the consecutive N symbols in the

symbol sequence {s(j)} or the kth symbols in the symbol subsequences {[s.sub.m](k)}, m = 0, 1, ..., (N - 1).

In the basic CE technique, the baseband symbols are mapped to a higher constellation in a random fashion and the constellation

symbol sequence that produces minimum OOBR, is selected for transmission.

The modulated

symbol sequence is then fed into the OSTBC encoder.

The transmitted

symbol sequence is [x.sub.r,0]{[c.sub.0], [c.sub.1], ...

If the information

symbol sequence is of unit power then (21) becomes:

In PTS scheme, an input

symbol sequence A' is partitioned into V 'disjoint' symbol sub sequences [A.sub.v] = [[A.sub.v,0] [A.sub.v,1] ....

There are really only three things that an FSA can do: concatenation (put two

symbol sequences in sequence), union (choose between two different

symbol sequences), or Kleene star (repeat some

symbol sequence).

SYMBOL SEQUENCE: The number seven with its mirror image

By their very nature, the

symbol sequence length is short, just one picture.

A (possibly complex-valued) Ts/2-spaced

symbol sequence {[bar.x](n)} is transmitted through a pulse shaping filter.

As an example, the word SIP is spelled out by the

symbol sequence Si, P (atomic numbers 14, 15).