Orthogonol signals

On 25.11.2015 15:25, Steve Pope wrote:
> kaz <37480@DSPRelated> wrote:
>
>> [attribution lost] wrote,
>
>>> Orthogonal means that if you multiply them, multiply by a weight
>>> function (which might be one) and integrate over the appropriate
>>> interval, the result is zero.
>
>> Does this apply to say sine/cosine waveforms. I generated 2^20 samples
>> each. multiplied them and integrated but can't see the above definition
>> apply. What am I missing?
>
> Except for truncation errors you should get zero correlation
> between a sine and a cosine of the same frequency.

... and between any sine or cosine of different (positive)frequencies

>
> If you get a non-zero value, compare it to the correlation of
> just the sine signal with itself; the latter value should be
> much much larger.
>
> Steve
>