A joint detection algorithm of integer frequency offset estimation and cell ID based on 5G-NR-V2X

Complexity-Effective Joint Detection of Physical Cell Identity and Integer Frequency Offset in 5G New Radio Communication Systems

“…To show the benefits of the proposed approach, we compare it with three representative NR-PSS synchronization schemes as baselines [20][21][22][23]. These benchmark methods can be easily extended to enable M v -average estimation.…”

“…where • 2 denotes the two-norm of vector, the columns of U consists of the M r normalized eigenvectors of FF H involved to the M r largest eigenvalues, M r stands for the rank order of the reduced channel matrix, F denotes the M s × L normalized DFT matrix whose (m, n)-th component is e −j2πmn/M , and Ȳq l ( υ, w) is the M s -dimensional vector with components { Ȳq l (m + υ)D * w(m); m ∈ D}. The second reference is the joint detection of ICFO and CIDS (JDICID), which can be formulated as [21,22] ( υ, ŵ) =arg max…”

“…During the NR initial access procedure, the NR-PSS detection can be challenging due to the presence of substantial initial time and frequency offsets, which may result in performance degradation of the UE receiver [17][18][19]. To solve such a problem, a differential correlation strategy was devised to jointly detect the integer CFO (ICFO) and CIDS in the frequency domain [20][21][22][23]. One approach presented in [20] is based on maximum likelihood (ML) detection, utilizing minimum mean-square-error (MMSE) reduced-rank approximation of the channel.…”

“…Despite the ML approach offering optimal detection performance, its computational intensity makes it less suitable for practical implementations. Conversely, the joint synchronization of ICFO and NR-PSS presented in [21,22] offers sub-optimal synchronization performance with moderate computational complexity as an alternative. In one paper [23], a reduced-complexity joint detection method for ICFO and NR-PSS was proposed using the cyclic-shifted property of NR-PSS.…”