pseudonoise; PN
Technical term in computing and signal processing for a signal that resembles random noise but is generated by a deterministic algorithm.
Pseudonoise sequences are often used in spread-spectrum communication.
擬似乱数 refers to pseudorandom numbers in general, while 近似雑音 specifically denotes a pseudonoise signal, which is a type of pseudorandom signal used in communications.
pseudonoise sequence; PN sequence
Compound of 近似 (approximation) and 雑音 (noise), likely a calque from English 'pseudonoise'.