H - Electricity – 04 – J
Patent
H - Electricity
04
J
H04J 3/02 (2006.01) H04B 7/10 (2006.01) H04B 14/00 (2006.01) H04M 3/18 (2006.01) H04Q 7/22 (2006.01)
Patent
CA 2051738
A method of reducing in a digital time multiplex mobile telephony system the risk of poor reception as a result of the occurrence of points of low signal strength, so-called zero points. Transmission from fixed stations is effected with a polarization direction which is changed stepwise between different parts of the transmitted information. This causes the fading patterns around receiving stations to change in time, and also causes any zero points to be moved in the geography, therewith making it improbable that more than a small part of an information frame will be lost. In the case of a GSM-type system, the polarization direction is changed for each. new TDMA-frame.
Marks & Clerk
Telefonaktiebolaget Lm Ericsson
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