Subband signal processing adaptive array with a data transmission scheme inserting a cyclic prefix

Abstract

SUMMARYThe advantages of subband signal processing adaptive array (SBAA) are the ability to perform parallel signal processing in each subband division and the substantial reduction in the total computational load. However, the price is not preventing a drop in performance, for example, the incorporation of delayed waves, and a countermeasure must be found. Therefore, in this paper, we propose introducing a scheme that inserts a guard interval (cyclic prefix), which is commonly adopted in Orthogonal Frequency Division Multiplexing (OFDM), into ordinary data transmission, and extracts the best possible performance of SBAA. We also evaluate the performance by a computer simulation.

Innovative Antennas and Propagation Studies for MIMO Systems

“…For adaptive array operation, we have confirmed that single-carrier transmission with cyclic prefix, and frequency-domain block signal processing, which is called subband signal processing, is a promising way [21]- [23]. Based on this background, subband adaptive array for spacetime block coding (STBC) in single carrier MIMO transmission with cyclic prefix has been proposed [24].…”

Subband Adaptive Array with Reduced Pilot Signal Using Maximal Ratio Combining Scheme

“…This figure shows the proposed schemes almost converge within two blocks, and particularly for SNR ≥ 10dB, one block is tolerable. Here we should remark that conventional subband adaptive algorithm [10] requires the pilot signals of at least N r blocks, and under the above condition, the correlation matrix becomes singular.…”

“…Figure 2 shows the structure of the SBAA considered in this study. It is known the addition of cyclic prefix (CP) which is widely used in OFDM (orthogonal frequency division multiplex) to the transmit data is effective also in single carrier case using subband processing in the receiver [9], [10]. In this study, the addition of sufficient length of CP (equal to max…”

“…6 which evaluates the input-output SNR relation for various schemes, the proposed approach described in section III is compared with conventional SBAA [10] with M = 16 block pilot length (adopting M = 5 suffers about 6dB degradation). One antenna reception without space diversity (N r = 1) is also plotted for reference.…”

CORPS - Combined Recursion Processing of Subsets for Adaptive Array Antennas Under Frequency Selective Fading

“…In addition to CORPS, three conventional AAs, TDLAA, SBAA, and SBAA with cyclic prefix (SBAA-CP) [10] are considered for the comparison.…”