Talk:Walsh function

I have no idea what this is about. Can someone rephrase this article in similar terminology please? I encountered it while reading through Modern Digital and Analog Communication Systems by Lathi 4th edition on page 50 section 2.7.4 Some Examples of Generalized Fourier Series. — Preceding unsigned comment added by 68.126.206.55 (talk) 19:13, 9 March 2012 (UTC)

The Walsh functions consist of trains of square pulses with the allowed states being -1 and 1, such that transitions may only occur at fixed intervals opf a unit time step. Walsh functions were used by electrical engineers in 1890s and were introduced into Mathematics in 1923

It would be great if you could incorporate that into the introduction. I have no knowledge on the subject. X-Fi6 (talk) 08:06, 11 February 2013 (UTC)