Systems and methods for communication with bottom-hole assemblies

A method for downlink communication comprising:

• identifying, by at least one processor of a control system, a command ratio value (CRV) associated with at least one command;
• based on the CRV, determining, by the at least one processor, a command time (CT) and a command divisor time (CDT) for encoding the at least one command into a command signal;
• transmitting, by the at least one processor, the command signal by controlling modulation of drilling fluid flow properties and generating a modulated fluid flow,
• wherein the modulated fluid flow:
• (i) extends for a duration of time equal to the CT, and (ii) varies between at least a base flow state and a modified flow state, the modified flow state extending for the command divisor time (CDT).

A method for downlink communication comprising:

• detecting, by at least one controller of the bottom-hole assembly (BHA), a modulated fluid flow corresponding to the command signal,
• wherein the modulated fluid flow:
• (i) extends for a duration of time equal to a command time (CT), and (ii) varies between at least a base flow state and a modified flow state, the modified flow state extending for a command divisor time (CDT);
• and;
• analyzing, by the at least one controller, the modulated fluid flow to determine a command time (CT) and the command divisor time (CDT);
• determining, by the at least one controller, a command ratio value (CRV) based on the analyzed CT and CDT;
• and
• decoding, by at least one controller, for at least one command based on the CRV.