Translingual

Symbol

ZF

1. (metrology) Symbol for the zettafarad, an SI unit of electrical capacitance equal to 10²¹ farads.

English

Proper noun

ZF

1. (set theory) Zermelo-Fraenkel set theory, without the axiom of choice.
2. (telecommunications, signal processing) zero force
   • 2008, Byeong Gi Lee, Sunghyun Choi, Broadband Wireless Access and Local Networks:

     In the case of the ZF detector, we suppress the interference among the transmit streams by multiplying the received signal vector y with the Moore-Penrose pseudo-inverse of the channel matrix […]

   • 2010, Dayan Adionel Guimaraes, Digital Transmission, page 348:

     However, due to its simplicity, ZF equalization is a good choice when the channel is known and fixed, and also when there is no frequency notch in the channel frequency response […]

   • 2013, Academic Press Library in Signal Processing, page 308:

     Thus, the importance of the upper bound is in showing that even in the most optimistic case, the achievable rate cannot exceed the ZF rates by more than 10%.

See also

• (in set theory): ZFC, NBG