And then , the esprit bearing estimation problem . is reformulated using fourth - order cumulant matrices instead of auto - correlation matrices . by doing so , the fourth - order cumulant matrices of additive colored gaussian noises can be suppressed 在此基礎(chǔ)之上,將esprit方法擴展到四階方法,用四階累積量矩陣代替自相關(guān)矩陣,實現(xiàn)對加性有色高斯噪聲的抑制,提高算法的估計精度。