Patent ID: 7180421
Filing Date: 2007-02-20
Classification: G06K

Abstract:
1. An asymmetric bandwidth communication system comprising: a. a powered interrogator/reader downlink transmitting in a non-TDCIR signal; b. a transponder or tag receiving said non-TDCIR signal to at least partially or wholly power said tag; c. said non-TDCIR downlink transmission from said interrogator/reader instructing said transponder to broadcast data; d. said transponder uplink communicating with said interrogator/reader using time domain carrierless impulse radio (TDCIR) having ultra wide band width frequency spectrum of a short time duration pulse; and e. said powered interrogator/reader receiving the TDCIR ultra wide band short time duration pulse uplink communication; whereby data is communicated from said transponder or tag to the said interrogator/reader using very little transponder power and an uncomplicated, low cost transponder design that is easily manufactured.