In Chapter 2, two spectrum spreading methods were described: chirp and direct sequence. Other methods are frequency hopping and time hopping, as well as combinations of the four. This chapter deals ...

There are three basic types of spread spectrum signals: frequency hopping, chirp, and direct sequence. Each approach spreads the signal. However, the nature of the power versus frequency versus time ...

In 1940, Austrian-born Hedy Lamarr, considered one of the sexiest actresses of her time, was also a co-inventor of frequency hopping. She, along with George Antheil, an American composer ...

[BeMasher]’s Itron C1SR smart meter broadcasts both interval data and standard consumption in the 915MHz ISM band using a Manchester encoded, frequency hopping spread spectrum protocol.

Known as "pseudo-random noise codes," Walsh codes are used in direct sequence spread spectrum (DSSS) systems such as Qualcomm's CDMA. They are also used in frequency hopping spread spectrum (FHSS ...