Title: Probing cosmic reionization with 21-cm signal Abstract: The formation of the first luminous sources in the Universe, such as the first generation of stars and accreting black holes, led to the ionization of hydrogen gas present in the intergalactic medium (IGM). This period in which the Universe transitioned from a cold and neutral state to a predominantly hot and ionized state is known as the Epoch of Reionization (EoR). The EoR is one of the least understood epochs in the Universe's evolution mostly due to the lack of direct observations. We can probe the reionization process with the 21-cm signal, produced by the spin-flip transition in neutral hydrogen. However, current radio telescopes have not been able to detect this faint signal but have put interesting upper limits. I will discuss about few of the current efforts to observe the 21-cm signal. We expect the upcoming Square Kilometre Array (SKA) telescope will be sensitive enough not only to detect the 21-cm signal produced during EoR but also to produce images of its distribution on the sky. In the second part, I will talk about how we are prepapring for the upcoming SKA observations and present various methods that we are developing to extract useful information from these images.