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1. (WO2017155547) BIT-SCRAMBLING IN DIFFERENTIAL PULSE POSITION MODULATION

Pub. No.:    WO/2017/155547    International Application No.:    PCT/US2016/022144
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Sat Mar 12 00:59:59 CET 2016
IPC: E21B 47/12
E21B 47/18
E21B 47/20
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: CHU, Jianying
Title: BIT-SCRAMBLING IN DIFFERENTIAL PULSE POSITION MODULATION
Abstract:
A system, in some embodiments, comprises: a controller; and a mud pulse telemetry modulator coupled to the controller and configured to modulate a mud column using differential pulse position modulation (DPPM) code words comprising most significant bits and least significant bits, wherein the controller allocates the most significant bit in each of said code words to a first data parameter having a first importance value and the least significant bit in each of said code words to a second data parameter having a second importance value that is lower than the first importance value.