In this letter, a code-domain nonorthogonal multiple access (NOMA) technique based on an
algebraic design is studied. We propose an improved low-density spreading (LDS) …

The spectral efficiency of a hybrid cellular direct-sequence/frequency hopping code-division
muItiple-access (DS/FH-CDMA) system operating in a Rayleigh-fading environment is …

In this paper, we propose new techniques for CDMA/MIMO systems that employ multiple
spreading codes. Rather than assigning each transmit antenna a different spreading …

The theoretically achievable average channel capacity (in the Shannon sense) per user of a
hybrid cellular direct sequence/fast frequency hopping code‐division multiple‐access …

Permutation spreading has been proposed as an alternative technique for assigning
spreading codes to the different transmit antennas of a user in a multiple input multiple …

Abstract Code Division Multiple Access (CDMA) and multiple input multiple output-(MIMO-)
CDMA systems suffer from multiple access interference (MAI) which limits the spectral …

Parity bit selected spreading and permutation spreading have been proposed as alternative
techniques for assigning spreading codes to different users in a multiple input multiple …

The optimization between the processing gain and the theoretically achievable average
channel capacity per user (in the Shannon sense) of a constant total system's allocated …

The optimization between the processing gain and the theoretically achievable average
channel capacity (in the sense of information theory) per user of a constant total system's …

In this paper, a constant total system's allocated bandwidth hybrid direct-sequence/fast
frequency hopping code-division multiple-access (DS/FFH-CDMA) cellular system, when …