Aerospace and Electronic Systems Magazine March 2018 - 10

Bistatic Shipborne High Frequency Surface Wave Radar

Figure 8.

Figure 7.

Bistatic HFSWR coastal transmitter and shipborne receiver as MISO.
(a) System configuration. (b) Clutter spectrum. (c) SINR loss.

the array frontlobes and backlobes have the same Doppler frequency. Consequently, for the MISO case, the SINR loss has four deep
notches, as shown in Figure 7c, meaning that the UDSF of this
MISO configuration is less than that of the SIMO configuration.
To solve the problem of reduced UDSF in the MISO configuration, after investigation, we found that we can simply add one more
antenna to the receiver and form a MIMO system, as shown in Fig10

Bistatic HFSWR coastal transmitter and shipborne receiver as MIMO.
(a) System configuration. (b) Clutter spectrum. (c) SINR loss.

ure 8a. Under this MIMO configuration, the transmitting array and
receiving array can form a 2D virtual array, as illustrated in Figure
3b. Thus, with the enhanced spatial directivity, the clutter ridges generated by the array backlobe can be effectively suppressed. Figures
8b and 8c show the clutter spectrum and SINR loss, respectively, for
the proposed MIMO configuration. It can be seen that they are close
to the SIMO results shown in Figures 6b and 6c, and the UDSF is

IEEE A&E SYSTEMS MAGAZINE

MARCH 2018



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