Clock timing jitters refer to random perturbations in the sampling time in analog-to-digital converters (ADCs). The perturbations are caused by circuit imperfections in the sampling clock. This paper analyzes the effect of sampling clock jitter on the acquired samples. The paper proposes two methods to estimate the jitter for superheterodyne receiver architectures and cognitive radio architectures at high sampling rates. The paper also proposes a method to compensate for the jitter. The methods are tested and validated via computer simulations and theoretical analysis.