Site-Level Deterministic Channel Emulator: Grid-based Architecture and Continuous Channel Emulation Technique

Grid-Based Channel Modeling Technique for Scenario-Specific Wireless Channel Emulator Based on Path Parameters Interpolation

“…With the MS position provided by WCE orchestrator, WCE can determine this MS-associated grid by inquiring its database to search for the grid whose all nodes surround the MS position. As conceptualized in [20], when the WCE is running, only the reference spatial parameters of these neighbors are converted to SoS-TDL parameters given the updated information on the MS velocity and antenna patterns at every interval ∆t o . Generally, C mn (t ij ) is computed by applying the antenna radiation patterns of MS and BS to the reference dualpolarized ray's weight parameters [21], while ν mn (t ij ) is the projection of the AoA parameters in the MS velocity direction normalized by the wavelength [17], [21], respectively.…”

“…5. In practical implementation, the path clustering algorithm is required to group a set of deterministic paths in the same tap delay, while the parameter interpolation scheme also requires spatial association among D nodes [20]. Since these algorithms introduce additional artifacts to the interpolated parameters, a perfect association of rays among D nodes and a single ray per tap condition are assumed.…”

“…According to [20], [21], the weight of SoS-TDL ray can be expressed as the multiplication of the dual-polarized complex ray's weight matrix to both MS and BS antenna radiation pattern in its respective polarization. However, for simplicity, the analysis of the weight interpolation will consider only a single polarization.…”

“…Hence, DM's high computation is replaced by the light computation of the interpolation process during channel emulation. The authors briefly described the overview architecture and practical challenges such as path clustering and path association in [20]. • The authors analytically derive the interpolated parameters to assert the limitations of the proposed channel modeling technique.…”

Grid-Based Channel Emulation Technique for Enabling Wireless Channel Emulator in Device-to-Device Communication

“…In comparison with the grid-based channel under the BSdevice topology addressed in [12], the technical challenges in 2L-GBCE are clearly more significant. WCE database size should be exponentially larger with two-layer grids, especially in the large-scale environment.…”