You can setup an Ad Hoc network connection by following the directions below:For Windows 7 Operating System

Open the Start Menu.
Click Control Panel.
Click Network and Internet.
Click Network and Sharing Center.
Under Change your networking settings, click Set up a new connection or network.
Select Set up a wireless ad hoc (computer-to-computer) network.
Click on Next twice.
Enter the Network name such as “Logic Network”.
Select the Security WAP (or WEP).
Enter the Security key or password.
Check Save this network check box.
Click Turn on Internet connection sharing.

Continue with Part 2 below.Part 2: Connect your mobile device

Tap on the Settings icon in your iPhone main menu.
Click on Wi-Fi.
Your Ad Hoc network “Logic Network” should appear in the list.
Click on you network.
Enter the Password.