For the bipolar voltages i have planned to use a charge pump of 5v and use a split rail power supply. The entire system uses a 3.7v lipo battery. The problem i'm facing is ground reference. There is a virtual ground from the split rail power supply and 3.3v LDO has a ground. Is implementing such a system is possible if so how to connect the ground and virtual ground?
no, it is not possible to mix a 0V with virtual ground/0V.
ALL voltages are with reference to a 0V !
As Mariush has suggested there are special ASICs that convert a positive voltage to a negative voltage.
I was going to suggest the old classic 7660, which converts a positive toltage to a negative voltage.
Hope that helps.